Ayres, F H USBC (universal standard book code) Its use for union file creation: A feasibility study for a national database - London: The British Library, 1984 - 32p. ISBN: 0-7123-1020-7 Subjects--Topical Terms: Universal standard book code Subjects--Index Terms: National database Library information Universal Decimal Class. No.: D 025.315:061.68 / M4