Developments in microcomputing — Discovering new opportunities for libraries in the 1990s: 12th international Essen symposium, 23 October–26 October 1989: A.H. Helal and J.W. Weiss(Eds.). Universitatsbibliothek Essen, Essen, Germany (1990). (Veroffentlichungen der Universitatbibliothek Essen; 12). xxxv + 224 pp., ISBN 3-922602-13-4, ISSN 0931-7503