ISBN 973-9439-73-8 hat failed the check­sum digit test.
The following 16 formally correct ISBNs were determined. Starting from these ISBNs the value 973-9439-73-8 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: Japan
ISBNas­su­med er­rorCatalogs for checking
4-7399-3973-81st and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: China, People's Republic
ISBNas­su­med er­rorCatalogs for checking
7-7394-3973-8first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Denmark*
ISBNas­su­med er­rorCatalogs for checking
87394397391st and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Netherlands
ISBNas­su­med er­rorCatalogs for checking
94-397-3973-82nd and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Hungary
ISBNas­su­med er­rorCatalogs for checking
963-9439-73-8second digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Romania
ISBNas­su­med er­rorCatalogs for checking
973-34-3973-8fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
973-9434-73-8seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
973-9439-43-8eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
973-9439-73-Xtenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
973-9439-74-8ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
973-9439-83-78th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
973-98397-3-8fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Thailand
ISBNas­su­med er­rorCatalogs for checking
974-93397-3-83rd and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Caribbean Community
ISBNas­su­med er­rorCatalogs for checking
976-9439-73-8third digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Nigeria
ISBNas­su­med er­rorCatalogs for checking
978-943-973-33rd and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Indonesia
ISBNas­su­med er­rorCatalogs for checking
979-9433-73-83rd and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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