ISBN 963911642 was input with 9 digits (one digit too few).
The ISBN 963911642 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 8 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: Netherlands
ISBNas­su­med er­rorCatalogs for checking
94-6391-164-2second digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Slovenia
ISBNas­su­med er­rorCatalogs for checking
961-391-164-2third digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Hungary
ISBNas­su­med er­rorCatalogs for checking
963-7911-64-2fourth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-9114-64-2seven­th digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-9116-42-4tenth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-9116-43-2ninth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-9116-74-2eighth digit was drop­ped. amazon.co.uk amazon.com amazon.de
963-9311-64-2fifth digit was drop­ped. amazon.co.uk amazon.com amazon.de

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