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International Standard Numbers (ISNs)


International Standard Numbers are unique codes used by publishers, libraries and suppliers to identify published monographs, serials and music. ISBNs (International Standard Book Numbers) are assigned to books, pamphlets, educational kits, microforms, CD-ROMs and other digital and electronic publications; ISSNs (International Standard Serial Numbers) to serial publications; and ISMNs (International Standard Music Numbers) to printed music publications.