ISBN 964634223 was input with 9 digits (one digit too few).
The ISBN 964634223 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
6964634223first digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: International NGO Publishers and EU Organizations
ISBNas­su­med er­rorCatalogs for checking
92-64-63422-3second digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Iran
ISBNas­su­med er­rorCatalogs for checking
964-6324-22-3sixth digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-6342-21-3ninth digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-6342-23-Xtenth digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-6342-52-3eighth digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-6347-22-3seven­th digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-6434-22-3fifth digit was drop­ped. amazon.co.uk amazon.com amazon.de
964-96342-2-3fourth digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Malaysia
ISBNas­su­med er­rorCatalogs for checking
967-463-422-3third digit was drop­ped. amazon.co.uk amazon.com amazon.de

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