Today's challenge: planning for the information service user: Proceedings of the Eusidic Conference, Berlin (West), 9-11 November 1977 - Berlin: Eusidic, 1977 - 132p. ISBN: 0906518008 Subjects--Topical Terms: Information science Subjects--Index Terms: User protection Telecommunications Universal Decimal Class. No.: D 002.001.1(082.2) / L8