ISBN 8304038547 hat failed the check­sum digit test.
The following 12 formally correct ISBNs were determined. Starting from these ISBNs the value 8304038547 that you input could have resulted frome one error (error in one digit or transposition of two digits.) You can now check using the links given for the catalogs of amazon.co.uk, amazon.com and amazon.de whether any book is listed for the respective URL. To the home page
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ISBN prefix group: English language
ISBNas­su­med er­rorCatalogs for checking
0-304-03854-7first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: German language
ISBNas­su­med er­rorCatalogs for checking
3-304-08854-71st and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-340-3854-72nd and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Poland
ISBNas­su­med er­rorCatalogs for checking
83-02-03854-7fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-04-03584-77th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
83-04-03754-87th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
83-04-03844-7eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-04-03854-4tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-04-03858-7ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-04-09854-7sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-04-53854-7fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
83-14-03854-7third digit was chan­ged. amazon.co.uk amazon.com amazon.de

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