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International Standard Book Numbers

I have implemented an Ada package for handling and checking ISBN’s based on an article by Kjeld Bagger Laursen ([email protected]).

I have not spent much time checking if it works correctly (or on other compilers than GNU/Ada). Please write me if you find errors or problems, or if you have suggestions for improvements.

You can browse the source code on-line.

You can learn about Ada in the Ada Programming wikibook.

To do:

  • It might be an idea to add support for ISBN-13.

1998-02-06:

First published edition.