Proceedings of the 18th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval : SIGIR '95 ; Seattle, Washington, USA, July 9 - July 13, 1995 - Fox, Edward Alan (Hrsg.); International Conference on Research and Development in Information Retrieval (18 : 1995 : Seattle, Wash.); Association for Computing Machinery. Special Interest Group on Information Retrieval (SIGIR forum. Special issue, 1995)