Edwards , P , Bayer , D , Green , C L & Payne , T R 1996 , Experience with Learning Agents which Manage Internet-Based Information . in M A Hearst & H Hirsh (eds) , Proceedings of AAAI 1996 Stanford Spring Symposium on Machine Learning in Information Access . vol. SS-96-05 , AAAI Press , Menlo Park, CA , pp. 31-40 .