ISBN 963845816 was input with 9 digits (one digit too few).
The ISBN 963845816 that you entered has got 9 digits, i.e. one digit is missing to make a valid ISBN. You can find information on the format of an ISBN on the home page of this site. This site has found the following 10 numerically correct ISBN out of which the ISBN that you input coule have resulted by a single error (dropping one digit). You can now check out these suggestions in the databases of the following booksellers' sites: amazon.co.uk (UK), amazon.com (USA) and amazon.de (Germany). Additional sites to search by ISBN (in this case, in catalogs of libraries) are e.g. the Library of Congress (USA) or the search gateway of the Deutsche Bibliothek. To the home page
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ISBN prefix group: [no known group prefix]
ISBNas­su­med er­rorCatalogs for checking
6963845816first digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: International NGO Publishers and EU Organizations
ISBNas­su­med er­rorCatalogs for checking
92-63-84581-6second digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Hungary
ISBNas­su­med er­rorCatalogs for checking
963-684-581-6fourth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8245-81-6fifth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8458-16-Xtenth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8458-18-6ninth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8458-21-6eighth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8459-81-6seven­th digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-8465-81-6sixth digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Malaysia
ISBNas­su­med er­rorCatalogs for checking
967-384-581-6third digit was drop­ped. amazon.co.uk amazon.com amazon.de

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