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The following tools will convert any ISBN-10 to an ISBN-13 along with the correct check digit value. Nihiltres' ISBN tool; ISBN converter of the U.S. Library of Congress; ISBN converter of ISBN.org; Stylistically, please: Use 13-digit ISBNs, if both are provided by the original work, as these are now standard as of January 1, 2007, and issued ...
calling functions are required to ensure that <isbn13> is a properly formed string of 13 digits (no separators) that begins with 978.]] local function convert_to_isbn10 (isbn13) local isbn9 = isbn13: sub (4, 12);-- get the 9 digits of <isbn13> that follow the '978' GS1 prefix (drop the check digit) local check = 0;-- initialize the check digit ...
International ISBN Agency – coordinates and supervises the worldwide use of the ISBN system. Conversion tool: ISBN-10 to ISBN-13 and ISBN-13 to ISBN-10 from the ISBN agency. Also shows verifies correct hyphenation and whether an ISBN is valid or not.
The calculation of an ISBN-13 check digit begins with the first twelve digits of the 13-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.
However, there is often a "view all editions" link on the results page from an ISBN search. Google books often lists other editions of a book and related books under the "about this book" link. You can convert between 10 and 13 digit ISBNs with these tools: ISBN converter at ISBN.org
The template takes as argument a valid ISBN and yields the formatted version of that ISBN. Any existing hyphens in the ISBN are ignored, whether or not they are correctly placed: {{format ISBN|97-8-1-57181655-9}} → 978-1-57181-655-9 {{Format ISBN}} is intended to be substituted so that the template call in wikitext is replaced with the ...
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This is what the MediaWiki software does, and that is fine. It is possible to convert a 10-digit ISBN to a 13-digit one by prefixing 978- and recomputing the final checksum digit, but people who cite books or search in library catalogs, based on a printed book from 1970-2006, will not do this. --LA2 20:35, 10 September 2007 (UTC)
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