ISBN 8072039418 hat failed the check­sum digit test.
The following 18 formally correct ISBNs were determined. Starting from these ISBNs the value 8072039418 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
0-07-203941-8first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: German language
ISBNas­su­med er­rorCatalogs for checking
3-07-208941-81st and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-02-73941-83rd and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-12-03947-83rd and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7003-941-8fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7203-041-8seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7203-841-97th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7203-914-88th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7203-931-8eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7203-941-5tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7203-945-8ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7203-981-48th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-7209-941-8sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7253-941-8fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-7403-921-84th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-8203-941-8third digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-920374-1-83rd and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Denmark
ISBNas­su­med er­rorCatalogs for checking
87-7203-941-8second digit was chan­ged. amazon.co.uk amazon.com amazon.de

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