Although each ISBN or title should be of exclusiveness,quite a few titles in several vol- umes or series are given ISBNs for both a multi-volume or series title and a partial tide,which is the abuse of ISBNs made by publishers.

• ISBN 与图书本来具有唯一性,但不少多卷书或丛书的总题名既有 ISBN,各分卷(册)又有不同的 ISBN,这是出版界对 ISBN 的滥用。