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Appendix 1 of the International ISBN Agency's official user manual [16]: 33 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 ...
This is because ISBNs are often used as search strings and checksum differences between the two forms make it difficult to find items listed only under the other type. ISBN-10 and ISBN-13 use different check digit algorithms to compute the last digit of the ISBN. The following tools will convert any ISBN-10 to an ISBN-13 along with the correct ...
ISBNdb.com. ISBNdb.com is a large online database of book information available both via web interface and API. The database includes title, author, ISBN, ISBN13, publisher, publishing date, binding, pages, list price, and more. [ 1] It contains data on 33+ million books by more than 11 million authors, with more books added every day. [ 2]
The main academic full-text databases are open archives or link-resolution services, although others operate under different models such as mirroring or hybrid publishers. Such services typically provide access to full text and full-text search, but also metadata about items for which no full text is available.
In 2007, the length of an ISBN changed from 10 to 13 digits, and a new 3-digit prefix (978 or 979) was added in front of 10-digit ISBNs. [ 2] The following registration groups are compatible with or without a 978- prefix: 0–5. 600–639. 64–69. 7. 80–94. 950–989. 9900–9989.
Wikipedia:Book sources is the source text for Special:BookSources. Wikipedia talk:Book sources – For questions and discussion about the Book Sources pages. Wikipedia:ISBN – Guidelines for use of ISBNs on Wikipedia. List of academic databases and search engines. List of digital library projects.
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