12/3/2024
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Unique Country Code (UCC) and European Article Number (EAN) allocated 3-digit prefix for book publishers. The prefix is 978 or 979.
International Standard Book Number (ISBN) is a 9-digit number allocated to catalogue books. People use ISBN as book identifier.
A prefix plus a 9-digit ISBN, and a modulo 11 checksum make up a
Bookland barcode.