ISBN 000063391 was input with 9 digits (one digit too few).
The ISBN 000063391 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: English language
ISBNas­su­med er­rorCatalogs for checking
0-00-036339-1fifth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-063329-1eighth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-063391-7tenth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-063394-1ninth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-063539-1seven­th digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-069339-1sixth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-00-106339-1fourth digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-05-006339-1third digit was drop­ped. amazon.co.uk amazon.com amazon.de
0-200-06339-1second digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Japan
ISBNas­su­med er­rorCatalogs for checking
4-00-006339-1first digit was drop­ped. amazon.co.uk amazon.com amazon.de

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