Title
SIGIR '89 : proceedings of the twelfth Annual International ACMSIGIR Conference on Research and Development in Information Retrieval, Cambridge, Massachusetts USA, June 25-28, 1989 / edited by N.J. Belkin and C.J. van Rijsbergen ; held in cooperation with AICA-GLIR (Italy) ... [et al.], with additional support from Bell Communications Research ... [et al.].
Published
New York, N.Y. : Association for Computing Machinery ; Baltimore, MD : Copies may be ordered from ACM Order Dept., c1989.