@proceedings{DBLP:conf/sigir/89,
  editor    = {Nicholas J. Belkin and
               C. J. van Rijsbergen},
  title     = {SIGIR'89, 12th International Conference on Research and
               Development in Information Retrieval, Cambridge, Massachusetts,
               USA, June 25-28, 1989, Proceedings},
  publisher = {ACM},
  year      = {1989},
  isbn      = {0-89791-321-3},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}