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# International Standard Book Number

international standard book number, international standard book number united states agency
The International Standard Book Number ISBN is a unique numeric commercial book identifier

An ISBN is assigned to each edition and variation except reprintings of a book For example, an e-book, a paperback and a hardcover edition of the same book would each have a different ISBN The ISBN is 13 digits long if assigned on or after 1 January 2007, and 10 digits long if assigned before 2007 The method of assigning an ISBN is nation-based and varies from country to country, often depending on how large the publishing industry is within a country

The initial ISBN configuration of recognition was generated in 1967 based upon the 9-digit Standard Book Numbering SBN created in 1966 The 10-digit ISBN format was developed by the International Organization for Standardization ISO and was published in 1970 as international standard ISO 2108 the SBN code can be converted to a ten digit ISBN by prefixing it with a zero

Occasionally, a book may appear without a printed ISBN if it is printed privately or the author does not follow the usual ISBN procedure; however, this can be rectified later

Another identifier, the International Standard Serial Number ISSN, identifies periodical publications such as magazines; and the International Standard Music Number ISMN covers for musical scores

## Contents

• 1 History
• 2 Overview
• 21 How ISBNs are issued
• 22 Registration group identifier
• 23 Registrant element
• 231 Pattern for English language ISBNs
• 3 Check digits
• 31 ISBN-10 check digits
• 32 ISBN-10 check digit calculation
• 33 ISBN-13 check digit calculation
• 34 ISBN-10 to ISBN-13 conversion
• 35 Errors in usage
• 36 eISBN
• 4 EAN format used in barcodes, and upgrading
• 6 Notes
• 7 References

## History

The Standard Book Numbering SBN code is a 9-digit commercial book identifier system created by Gordon Foster, Emeritus Professor of Statistics at Trinity College, Dublin, for the booksellers and stationers WHSmith and others in 1965 The ISBN configuration of recognition was generated in 1967 in the United Kingdom by David Whitaker regarded as the "Father of the ISBN" and in 1968 in the US by Emery Koltay who later became director of the US ISBN agency RR Bowker

The 10-digit ISBN format was developed by the International Organization for Standardization ISO and was published in 1970 as international standard ISO 2108 The United Kingdom continued to use the 9-digit SBN code until 1974 ISO has appointed the International ISBN Agency as the registration authority for ISBN worldwide and the ISBN Standard is developed under the control of ISO Technical Committee 46/Subcommittee 9 TC 46/SC 9 The ISO on-line facility only refers back to 1978

An SBN may be converted to an ISBN by prefixing the digit "0" For example, the second edition of Mr J G Reeder Returns, published by Hodder in 1965, has "SBN 340 01381 8" - 340 indicating the publisher, 01381 their serial number, and 8 being the check digit This can be converted to ISBN 0-340-01381-8; the check digit does not need to be re-calculated

Since 1 January 2007, ISBNs have contained 13 digits, a format that is compatible with "Bookland" European Article Number EAN-13s

## Overview

An ISBN is assigned to each edition and variation except reprintings of a book For example, an ebook, a paperback, and a hardcover edition of the same book would each have a different ISBN The ISBN is 13 digits long if assigned on or after 1 January 2007, and 10 digits long if assigned before 2007 An International Standard Book Number consists of 4 parts if it is a 10 digit ISBN or 5 parts for a 13 digit ISBN:

The parts of a 10-digit ISBN and the corresponding EAN‑13 and barcode Note the different check digits in each The part of the EAN‑13 labeled "EAN" is the Bookland country code
1. for a 13-digit ISBN, a prefix element – a GS1 prefix: so far 978 or 979 have been made available by GS1,
2. the registration group element, language-sharing country group, individual country or territory
3. the registrant element,
4. the publication element, and
5. a checksum character or check digit

A 13-digit ISBN can be separated into its parts prefix element, registration group, registrant, publication and check digit, and when this is done it is customary to separate the parts with hyphens or spaces Separating the parts registration group, registrant, publication and check digit of a 10-digit ISBN is also done with either hyphens or spaces Figuring out how to correctly separate a given ISBN number is complicated, because most of the parts do not use a fixed number of digits

### How ISBNs are issued

ISBN issuance is country-specific, in that ISBNs are issued by the ISBN registration agency that is responsible for that country or territory regardless of the publication language The ranges of ISBNs assigned to any particular country are based on the publishing profile of the country concerned, and so the ranges will vary depending on the number of books and the number, type, and size of publishers that are active Some ISBN registration agencies are based in national libraries or within ministries of culture and thus may receive direct funding from government to support their services In other cases, the ISBN registration service is provided by organisations such as bibliographic data providers that are not government funded In Canada, ISBNs are issued at no cost with the stated purpose of encouraging Canadian culture In the United Kingdom, United States, and some other countries, where the service is provided by non-government-funded organisations, the issuing of ISBNs requires payment of a fee

Australia: ISBNs are issued by the commercial library services agency Thorpe-Bowker, and prices range from $42 for a single ISBN plus a$55 registration fee for new publishers to $2,890 for a block of 1,000 ISBNs Access is immediate when requested via their website Brazil: National Library of Brazil, a government agency, is responsible for issuing ISBNs, and there is a cost of R$16

Canada: Library and Archives Canada, a government agency, is responsible for issuing ISBNs, and there is no cost Works in French are issued an ISBN by the Bibliothèque et Archives nationales du Québec

Colombia: Cámara Colombiana del Libro, a NGO, is responsible for issuing ISBNs Cost of issuing an ISBN is about USD 20

India: The Raja Rammohun Roy National Agency for ISBNBook Promotion and Copyright Division, under Department of Higher Education, a constituent of the Ministry of Human Resource Development, is responsible for registration of Indian publishers, authors, universities, institutions, and government departments that are responsible for publishing books

Italy: The privately held company EDISER srl, owned by Associazione Italiana Editori Italian Publishers Association is responsible for issuing ISBNs The original national prefix 978-88 is reserved for publishing companies, starting at €49 for a ten-codes block while a new prefix 979-12 is dedicated to self-publishing authors, at a fixed price of €25 for a single code

Maldives: The National Bureau of Classification NBC is responsible for ISBN registrations for publishers who are publishing in the Maldives

Malta: The National Book Council Maltese: Il-Kunsill Nazzjonali tal-Ktieb issues ISBN registrations in Malta

New Zealand: The National Library of New Zealand is responsible for ISBN registrations for publishers who are publishing in New Zealand

Pakistan: The National Library of Pakistan is responsible for ISBN registrations for Pakistani publishers, authors, universities, institutions, and government departments that are responsible for publishing books

South Africa: The National Library of South Africa is responsible for ISBN issuance for South African publishing institutions and authors

United Kingdom and Republic of Ireland: The privately held company Nielsen Book Services Ltd, part of Nielsen Holdings NV, is responsible for issuing ISBNs in blocks of 10, 100 or 1000 Prices start from £120 plus VAT for the smallest block on a standard turnaround of ten days

United States: In the United States, the privately held company RR Bowker issues ISBNs There is a charge that varies depending upon the number of ISBNs purchased, with prices starting at $12500 for a single number Access is immediate when requested via their website Publishers and authors in other countries obtain ISBNs from their respective national ISBN registration agency A directory of ISBN agencies is available on the International ISBN Agency website ### Registration group identifier The registration group identifier is a 1- to 5-digit number that is valid within a single prefix element ie one of 978 or 979 Registration group identifiers have primarily been allocated within the 978 prefix element The single-digit group identifiers within the 978 prefix element are: 0 or 1 for English-speaking countries; 2 for French-speaking countries; 3 for German-speaking countries; 4 for Japan; 5 for Russian-speaking countries; and 7 for People's Republic of China An example 5-digit group identifier is 99936, for Bhutan The allocated group IDs are: 0–5, 600–621, 7, 80–94, 950–989, 9926–9989, and 99901–99976 Books published in rare languages typically have longer group identifiers Within the 979 prefix element, the registration group identifier 0 is reserved for compatibility with International Standard Music Numbers ISMNs, but such material is not actually assigned an ISBN The registration group identifiers within prefix element 979 that have been assigned are 10 for France, 11 for the Republic of Korea, and 12 for Italy The original 9-digit standard book number SBN had no registration group identifier, but prefixing a zero 0 to a 9-digit SBN creates a valid 10-digit ISBN ### Registrant element The national ISBN agency assigns the registrant element cf Category:ISBN agencies and an accompanying series of ISBNs within that registrant element to the publisher; the publisher then allocates one of the ISBNs to each of its books In most countries, a book publisher is not required by law to assign an ISBN; however, most book stores only handle ISBN bearing merchandise A listing of more than 900,000 assigned publisher codes is published, and can be ordered in book form €1399, US$1959 The web site of the ISBN agency does not offer any free method of looking up publisher codes Partial lists have been compiled from library catalogs for the English-language groups: identifier 0 and identifier 1

Publishers receive blocks of ISBNs, with larger blocks allotted to publishers expecting to need them; a small publisher may receive ISBNs of one or more digits for the registration group identifier, several digits for the registrant, and a single digit for the publication element Once that block of ISBNs is used, the publisher may receive another block of ISBNs, with a different registrant element Consequently, a publisher may have different allotted registrant elements There also may be more than one registration group identifier used in a country This might occur once all the registrant elements from a particular registration group have been allocated to publishers

By using variable block lengths, registration agencies are able to customise the allocations of ISBNs that they make to publishers For example, a large publisher may be given a block of ISBNs where fewer digits are allocated for the registrant element and many digits are allocated for the publication element; likewise, countries publishing many titles have few allocated digits for the registration group identifier and many for the registrant and publication elements Here are some sample ISBN-10 codes, illustrating block length variations

ISBN Country or area Publisher
99921-58-10-7 Qatar NCCAH, Doha
9971-5-0210-0 Singapore World Scientific
960-425-059-0 Greece Sigma Publications
80-902734-1-6 Czech Republic; Slovakia Taita Publishers
85-359-0277-5 Brazil Companhia das Letras
1-84356-028-3 English-speaking area Simon Wallenberg Press
0-684-84328-5 English-speaking area Scribner
0-8044-2957-X English-speaking area Frederick Ungar
0-85131-041-9 English-speaking area J A Allen & Co
0-943396-04-2 English-speaking area Willmann–Bell
0-9752298-0-X English-speaking area KT Publishing

#### Pattern for English language ISBNs

English-language registration group elements are 0 and 1 2 of more than 220 registration group elements These two registration group elements are divided into registrant elements in a systematic pattern, which allows their length to be determined, as follows:

Publication
element length
0 – Registration group element 1 – Registration group element Total
Registrants
From To Registrants From To Registrants
6 digits 0-00-xxxxxx-x 0-19-xxxxxx-x 20 1-00-xxxxxx-x 1-09-xxxxxx-x 10 30
5 digits 0-200-xxxxx-x 0-699-xxxxx-x 500 1-100-xxxxx-x 1-399-xxxxx-x 300 800
4 digits 0-7000-xxxx-x 0-8499-xxxx-x 1,500 1-4000-xxxx-x 1-5499-xxxx-x 1,500 3,000
3 digits 0-85000-xxx-x 0-89999-xxx-x 5,000 1-55000-xxx-x 1-86979-xxx-x 31,980 36,980
2 digits 0-900000-xx-x 0-949999-xx-x 50,000 1-869800-xx-x 1-998999-xx-x 129,200 179,200
1 digit 0-9500000-x-x 0-9999999-x-x 500,000 1-9990000-x-x 1-9999999-x-x 10,000 510,000
Total 557,020 Total 172,990 730,010

## Check digits

A check digit is a form of redundancy check used for error detection, the decimal equivalent of a binary check bit It consists of a single digit computed from the other digits in the number The method for the ten digit code is an extension of that for SBNs, the two systems are compatible, and SBN prefixed with "0" will give the same check-digit as without - the digit is base eleven, and can be 0-9 or X The system for thirteen digit codes is not compatible and will, in general, give a different check digit from the corresponding 10 digit ISBN, and does not provide the same protection against transposition This is because the thirteen digit code was required to be compatible with the EAN format, and hence could not contain an "X"

### ISBN-10 check digits

The 2001 edition of the official manual of the International ISBN Agency says that the ISBN-10 check digit – which is the last digit of the ten-digit ISBN – must range from 0 to 10 the symbol X is used for 10, and must be such that the sum of all the ten digits, each multiplied by its integer weight, descending from 10 to 1, is a multiple of 11

For example, for an ISBN-10 of 0-306-40615-2:

s = 0 × 10 + 3 × 9 + 0 × 8 + 6 × 7 + 4 × 6 + 0 × 5 + 6 × 4 + 1 × 3 + 5 × 2 + 2 × 1 = 0 + 27 + 0 + 42 + 24 + 0 + 24 + 3 + 10 + 2 = 132 = 12 × 11 s&=0\times 10+3\times 9+0\times 8+6\times 7+4\times 6+0\times 5+6\times 4+1\times 3+5\times 2+2\times 1\\&=0+27+0+42+24+0+24+3+10+2\\&=132=12\times 11\end

Formally, using modular arithmetic, we can say:

10 x 1 + 9 x 2 + 8 x 3 + 7 x 4 + 6 x 5 + 5 x 6 + 4 x 7 + 3 x 8 + 2 x 9 + x 10 ≡ 0 mod 11 +9x_+8x_+7x_+6x_+5x_+4x_+3x_+2x_+x_\equiv 0

It is also true for ISBN-10's that the sum of all the ten digits, each multiplied by its weight in ascending order from 1 to 10, is a multiple of 11 For this example:

s = 0 × 1 + 3 × 2 + 0 × 3 + 6 × 4 + 4 × 5 + 0 × 6 + 6 × 7 + 1 × 8 + 5 × 9 + 2 × 10 = 0 + 6 + 0 + 24 + 20 + 0 + 42 + 8 + 45 + 20 = 165 = 15 × 11 s&=0\times 1+3\times 2+0\times 3+6\times 4+4\times 5+0\times 6+6\times 7+1\times 8+5\times 9+2\times 10\\&=0+6+0+24+20+0+42+8+45+20\\&=165=15\times 11\end

Formally, we can say:

x 1 + 2 x 2 + 3 x 3 + 4 x 4 + 5 x 5 + 6 x 6 + 7 x 7 + 8 x 8 + 9 x 9 + 10 x 10 ≡ 0 mod 11 +2x_+3x_+4x_+5x_+6x_+7x_+8x_+9x_+10x_\equiv 0

The two most common errors in handling an ISBN eg, typing or writing it are a single altered digit or the transposition of adjacent digits It can be proved that all possible valid ISBN-10's have at least two digits different from each other It can also be proved that there are no pairs of valid ISBN-10's with eight identical digits and two transposed digits These are true only because the ISBN is less than 11 digits long, and because 11 is a prime number The ISBN check digit method therefore ensures that it will always be possible to detect these two most common types of error, ie if either of these types of error has occurred, the result will never be a valid ISBN – the sum of the digits multiplied by their weights will never be a multiple of 11 However, if the error occurs in the publishing house and goes undetected, the book will be issued with an invalid ISBN

In contrast, it is possible for other types of error, such as two altered non-transposed digits, or three altered digits, to result in a valid ISBN number although it is still unlikely

### ISBN-10 check digit calculation

Modular arithmetic is convenient for calculating the check digit using modulus 11 Each of the first nine digits of the ten-digit ISBN—excluding the check digit itself—is multiplied by a number in a sequence from 10 to 2, and the remainder of the sum, with respect to 11, is computed The resulting remainder, plus the check digit, must equal a multiple of 11 either 0 or 11 Therefore, the check digit is 11 minus the remainder of the sum of the products modulo 11 modulo 11 Taking the remainder modulo 11 a second time accounts for the possibility that the first remainder is 0 Without the second modulo operation the calculation could end up with 11 – 0 = 11 which is invalid Strictly speaking the first "modulo 11" is unneeded, but it may be considered to simplify the calculation

For example, the check digit for an ISBN-10 of 0-306-40615- is calculated as follows:

s = 11 − 0 × 10 + 3 × 9 + 0 × 8 + 6 × 7 + 4 × 6 + 0 × 5 + 6 × 4 + 1 × 3 + 5 × 2 mod 11 mod 11 = 11 − 0 + 27 + 0 + 42 + 24 + 0 + 24 + 3 + 10 mod 11 mod 11 = 11 − 130 mod 11 mod 11 = 11 − 9 mod 11 = 2 mod 11 = 2 s&=11-0\times 10+3\times 9+0\times 8+6\times 7+4\times 6+0\times 5+6\times 4+1\times 3+5\times 2\,11\,11\\&=11-0+27+0+42+24+0+24+3+10\,11\,11\\&=11-130\,11\,11=11-9\,11=2\,11=2\end

Thus the check digit is 2, and the complete sequence is ISBN 0-306-40615-2 The value x 10 required to satisfy this condition might be 10; if so, an 'X' should be used

It is possible to avoid the multiplications in a software implementation by using two accumulators Repeatedly adding t into s computes the necessary multiples:

// Returns ISBN error syndrome, zero for a valid ISBN, non-zero for an invalid one // digits must be between 0 and 10 int CheckISBNint const digits return s % 11;

The modular reduction can be done once at the end, as shown above in which case s could hold a value as large as 496, for the invalid ISBN 99999-999-9-X, or s and t could be reduced by a conditional subtract after each addition

### ISBN-13 check digit calculation

The 2005 edition of the International ISBN Agency's official manual describes how the 13-digit ISBN check digit is calculated The ISBN-13 check digit, which is the last digit of the ISBN, must range from 0 to 9 and must be such that the sum of all the thirteen digits, each multiplied by its integer weight, alternating between 1 and 3, is a multiple of 10

Formally, using modular arithmetic, we can say:

x 1 + 3 x 2 + x 3 + 3 x 4 + x 5 + 3 x 6 + x 7 + 3 x 8 + x 9 + 3 x 10 + x 11 + 3 x 12 + x 13 ≡ 0 mod 10 +3x_+x_+3x_+x_+3x_+x_+3x_+x_+3x_+x_+3x_+x_\equiv 0

The calculation of an ISBN-13 check digit begins with the first 12 digits of the thirteen-digit ISBN thus excluding the check digit itself Each digit, from left to right, is alternately multiplied by 1 or 3, then those products are summed modulo 10 to give a value ranging from 0 to 9 Subtracted from 10, that leaves a result from 1 to 10 A zero 0 replaces a ten 10, so, in all cases, a single check digit results

For example, the ISBN-13 check digit of 978-0-306-40615- is calculated as follows:

s = 9×1 + 7×3 + 8×1 + 0×3 + 3×1 + 0×3 + 6×1 + 4×3 + 0×1 + 6×3 + 1×1 + 5×3 = 9 + 21 + 8 + 0 + 3 + 0 + 6 + 12 + 0 + 18 + 1 + 15 = 93 93 / 10 = 9 remainder 3 10 – 3 = 7

Thus, the check digit is 7, and the complete sequence is ISBN 978-0-306-40615-7

In general, the ISBN-13 check digit is calculated as follows

Let

r = 10 − x 1 + 3 x 2 + x 3 + 3 x 4 + ⋯ + x 11 + 3 x 12 mod 10 10-x_+3x_+x_+3x_+\cdots +x_+3x_\,10

Then

x 13 = =r&r<10\\0&r=10\end

This check system – similar to the UPC check digit formula – does not catch all errors of adjacent digit transposition Specifically, if the difference between two adjacent digits is 5, the check digit will not catch their transposition For instance, the above example allows this situation with the 6 followed by a 1 The correct order contributes 3×6+1×1 = 19 to the sum; while, if the digits are transposed 1 followed by a 6, the contribution of those two digits will be 3×1+1×6 = 9 However, 19 and 9 are congruent modulo 10, and so produce the same, final result: both ISBNs will have a check digit of 7 The ISBN-10 formula uses the prime modulus 11 which avoids this blind spot, but requires more than the digits 0-9 to express the check digit

Additionally, if the sum of the 2nd, 4th, 6th, 8th, 10th, and 12th digits is tripled then added to the remaining digits 1st, 3rd, 5th, 7th, 9th, 11th, and 13th, the total will always be divisible by 10 ie, end in 0

### ISBN-10 to ISBN-13 conversion

The conversion is quite simple as one only needs to prefix "978" to the existing number and calculate the new checksum using the ISBN-13 algorithm

### Errors in usage

Publishers and libraries have varied policies about the use of the ISBN check digit Publishers sometimes fail to check the correspondence of a book title and its ISBN before publishing it; that failure causes book identification problems for libraries, booksellers, and readers For example, ISBN 0-590-76484-5 is shared by two books – Ninja gaiden® : a novel based on the best-selling game by Tecmo 1990 and Wacky Laws 1997, both published by Scholastic

Most libraries and booksellers display the book record for an invalid ISBN issued by the publisher The Library of Congress catalogue contains books published with invalid ISBNs, which it usually tags with the phrase "Cancelled ISBN" However, book-ordering systems such as Amazoncom will not search for a book if an invalid ISBN is entered to its search engine OCLC often indexes by invalid ISBNs, if the book is indexed in that way by a member library

### eISBN

Only the term "ISBN" should be used; the terms "eISBN" and "e-ISBN" have historically been sources of confusion and should be avoided If a book exists in one or more digital e-book formats, each of those formats must have its own ISBN In other words, each of the three separate EPUB, Amazon Kindle, and PDF formats of a particular book will have its own specific ISBN They should not share the ISBN of the paper version, and there is no generic "eISBN" which encompasses all the e-book formats for a title

## EAN format used in barcodes, and upgrading

Currently the barcodes on a book's back cover or inside a mass-market paperback book's front cover are EAN-13; they may have a separate barcode encoding five digits for the currency and the recommended retail price For 10 digit ISBNs, the number "978", the Bookland "country code", is prefixed to the ISBN in the barcode data, and the check digit is recalculated according to the EAN13 formula modulo 10, 1x and 3x weighting on alternate digits

Partly because of an expected shortage in certain ISBN categories, the International Organization for Standardization ISO decided to migrate to a thirteen-digit ISBN ISBN-13 The process began 1 January 2005 and was planned to conclude 1 January 2007 As of 2011, all the 13-digit ISBNs began with 978 As the 978 ISBN supply is exhausted, the 979 prefix was introduced Part of the 979 prefix is reserved for use with the Musicland code for musical scores with an ISMN 10 digit ISMN codes differed visually as they began with an "M" letter; the bar code represents the "M" as a zero 0, and for checksum purposes it counted as a 3 All ISMNs are now 13 digits commencing 979-0; 979-1 to 979-9 will be used by ISBN

Publisher identification code numbers are unlikely to be the same in the 978 and 979 ISBNs, likewise, there is no guarantee that language area code numbers will be the same Moreover, the ten-digit ISBN check digit generally is not the same as the thirteen-digit ISBN check digit Because the GTIN-13 is part of the Global Trade Item Number GTIN system that includes the GTIN-14, the GTIN-12, and the GTIN-8, the 13-digit ISBN falls within the 14-digit data field range

Barcode format compatibility is maintained, because aside from the group breaks the ISBN-13 barcode format is identical to the EAN barcode format of existing 10-digit ISBNs So, migration to an EAN-based system allows booksellers the use of a single numbering system for both books and non-book products that is compatible with existing ISBN based data, with only minimal changes to information technology systems Hence, many booksellers eg, Barnes & Noble migrated to EAN barcodes as early as March 2005 Although many American and Canadian booksellers were able to read EAN-13 barcodes before 2005, most general retailers could not read them The upgrading of the UPC barcode system to full EAN-13, in 2005, eased migration to the ISBN-13 in North America

• ASIN Amazon Standard Identification Number
• CODEN serial publication identifier currently used by libraries; replaced by the ISSN for new works
• DOI Digital Object Identifier
• ESTC English Short Title Catalogue
• ETTN Electronic Textbook Track Number
• ISAN International Standard Audiovisual Number
• ISMN International Standard Music Number
• ISWC International Standard Musical Work Code
• ISRC International Standard Recording Code
• ISSN International Standard Serial Number
• ISTC International Standard Text Code
• ISWN International Standard Wine Number
• LCCN Library of Congress Control Number
• List of group-0 ISBN publisher codes
• List of group-1 ISBN publisher codes
• OCLC number Online Computer Library Center number
• Registration authority
• BICI Book Item and Component Identifier
• SICI Serial Item and Contribution Identifier
• Special:Booksources, Wikipedia's ISBN search page
• VD 16 Verzeichnis der im deutschen Sprachbereich erschienenen Drucke des 16 Jahrhundertsin English: Bibliography of Books Printed in the German Speaking Countries of the Sixteenth Century
• VD 17 Verzeichnis der im deutschen Sprachraum erschienenen Drucke des 17 Jahrhundertsin English: Bibliography of Books Printed in the German Speaking Countries of the Seventeenth Century

## Notes

1. ^ Occasionally, publishers erroneously assign an ISBN to more than one title—the first edition of The Ultimate Alphabet and The Ultimate Alphabet Workbook have the same ISBN, 0-8050-0076-3 Conversely, books are published with several ISBNs: A German second-language edition of Emil und die Detektive has the ISBNs 87-23-90157-8 Denmark, 0-8219-1069-8 United States, 91-21-15628-X Sweden, 0-85048-548-7 United Kingdom and 3-12-675495-3 Germany
2. ^ In some cases, books sold only as sets share ISBNs For example, the Vance Integral Edition used only two ISBNs for 44 books

## References

1. ^ Bradley, Philip 1992 "Book numbering: The importance of the ISBN" PDF  245KB The Indexer 18 1: 25–26
2. ^ Foster, Gordon 1966 "INTERNATIONAL STANDARD BOOK NUMBERING ISBN SYSTEM original 1966 report" informaticsdevelopmentinstitutenet Archived from the original on 30 April 2011 Retrieved 20 April 2014
3. ^ a b "ISBN History" isbnorg 20 April 2014 Archived from the original on 20 April 2014 Retrieved 20 April 2014
4. ^ a b c d Manwal ghall-Utenti tal-ISBN PDF in Maltese 6th ed Malta: Kunsill Nazzjonali tal-Ktieb 2016 p 5 ISBN 978-99957-889-4-0 Archived from the original PDF on 17 August 2016
5. ^ a b Information Standards Quarterly PDF, 8 3, ISO, July 1996, p 12
6. ^ US ISBN Agency "Bowkercom – Products" Commercebowkercom Retrieved 2015-06-11
7. ^ Gregory, Daniel "ISBN" PrintRS Retrieved 2015-06-11
8. ^ ISO 2108:1978 PDF, ISO
9. ^ TC 46/SC 9, Frequently Asked Questions about the new ISBN standard from ISO, CA: LAC‐BAC
10. ^ "See paragraph 52 of ISBN Users' Manual International edition 2012" PDF  548 KB
11. ^ a b c d e International ISBN Agency 2012 ISBN Users' manual PDF isbn-internationalorg Sixth International ed pp 7, 23 ISBN 978-92-95055-02-5 Archived PDF from the original on 29 April 2014 Retrieved 29 April 2014
12. ^ Some books have several codes in the first block: eg A M Yaglom's Correlation Theory, published by Springer Verlag, has two ISBNs, 0-387-96331-6 and 3-540-96331-6 Though Springer's 387 and 540 codes are different for English 0 and German 3; the same item number 96331 produces the same check digit: 6 Springer uses 431 as their publisher code for Japanese 4 and 4-431-96331- would also have check digit  = 6 Other Springer books in English have publisher code 817, and 0-817-96331- would also get check digit  = 6 This suggests special considerations were made for assigning Springer's publisher codes, as random assignments of different publisher codes would not lead the same item number to get the same check digit every time Finding publisher codes for English and German, say, with this effect amounts to solving a linear equation in modular arithmetic
13. ^ The international ISBN agency's ISBN User's Manual says: "The ten-digit number is divided into four parts of variable length, which must be separated clearly, by hyphens or spaces" although omission of separators is permitted for internal data processing If present, hyphens must be correctly placed; see ISBN hyphenation definition The actual definition for hyphenation contains more than 220 different registration group elements with each one broken down into a few to several ranges for the length of the registrant element more than 1,000 total The document defining the ranges, listed by agency, is 29 pages
15. ^ "About the US ISBN Agency"
16. ^ "Bowker -- ISBN" Thorpe-Bowker 5 Jan 2009 Retrieved 29 March 2012
17. ^ "TABELA DE PREÇOS DOS SERVIÇOS" Biblioteca Nacional, Government of Brazil Retrieved 8 September 2015
18. ^ "Union HRD Minister Smt Smriti Zubin Irani Launches ISBN Portal"
19. ^ "ISBN – Chi siamo e contatti" in Italian EDISER srl Retrieved 3 January 2015
20. ^ "ISBN – Tariffe Servizi ISBN" in Italian EDISER srl Retrieved 3 January 2015
21. ^ "ISBN" Kunsill Nazzjonali tal-Ktieb 2016 Archived from the original on 23 October 2016
22. ^ Manwal ghall-Utenti tal-ISBN PDF in Maltese 6th ed Malta: Kunsill Nazzjonali tal-Ktieb 2016 pp 1–40 ISBN 978-99957-889-4-0 Archived from the original PDF on 17 August 2016
23. ^ "ISBNs, ISSNs, and ISMNs" National Library of New Zealand New Zealand Government Retrieved 19 January 2016
24. ^ "Nielsen UK ISBN Agency" Nielsen UK ISBN Agency Retrieved 2 January 2015
25. ^ "Bowker -- ISBN" RR Bowker 8 March 2013 Retrieved 8 March 2013
26. ^ "ISBN Ranges" isbn-internationalorg 29 April 2014 Select the format you desire and click on the Generate button Archived from the original on 29 April 2014 Retrieved 29 April 2014
27. ^ See a complete list of group identifiers ISBNorg sometimes calls them group numbers Their table of identifiers now refers to ISBN prefix ranges, which must be assumed to be group identifier ranges
28. ^ Hailman, Jack Parker 2008 Coding and redundancy: man-made and animal-evolved signals Harvard University Press p 209 ISBN 978-0-674-02795-4
29. ^ International ISBN Agency 5 December 2014 "International ISBN Agency – Range Message pdf sorted by prefix" PDF isbn-internationalorg p 29 Retrieved 15 December 2014
30. ^ See Publisher's International ISBN Directory
31. ^ Splane, Lily 2002 The Book Book: A Complete Guide to Creating a Book on Your Computer Anaphase II Publishing p 37 ISBN 978-0-945962-14-4
32. ^ "ISBN Ranges" isbn-internationalorg International ISBN Agency 15 September 2014 Retrieved 15 September 2014
33. ^ "ISBN Users' Manual – 4 Structure of ISBN" Isbnorg Archived from the original on 22 May 2013 Retrieved 2013-05-27
34. ^ For example, I'saka: a sketch grammar of a language of north-central New Guinea Pacific Linguistics ISBN "0-85883-554-4"
35. ^ "ISBN Users' Manual International edition 2012" PDF  284 KB Archived 29 April 2014 at the Wayback Machine
36. ^ Lorimer, Rowland; Shoichet, Jillian; Maxwell, John W 2005 Book Publishing I CCSP Press p 299 ISBN 978-0-9738727-0-5
37. ^ 020 – International Standard Book Number R – MARC 21 Bibliographic – Full Library of Congress
38. ^ sellboxcom, Retrieved, 9 October 2014
39. ^ Frequently asked questions, US: ISBN, 12 March 2014  — including a detailed description of the EAN-13 format
40. ^ "ISBN", ISO TC49SC9 FAQ, CA: Collections
41. ^ "Are You Ready for ISBN-13", Standards, ISBN
42. ^ "WorldCat Web service: xISBN OCLC – WorldCat Affiliate tools]: xOCLCNUM" Xisbnworldcatorg Retrieved 2013-05-27

• ISO 2108:2005
• Books at DMOZ
• "Are You Ready for ISBN-13" RR Bowker LLC
• International ISBN Agency—coordinates and supervises the worldwide use of the ISBN system
• Numerical List of Group Identifiers List of language/region prefixes
• Free conversion tool: ISBN-10 to ISBN-13 & ISBN-13 to ISBN-10 from the ISBN agency Also shows correct hyphenation & verifies if ISBNs are valid or not
• RFC 3187 Using International Standard Book Numbers as Uniform Resource Names URN
• "Implementation guidelines" PDF  510 KB for the 13-digit ISBN code

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29.10.2014

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