TY - CONF AU - Belkin, N AU - Dumais, S AU - Scholtz, Jean AU - Wilkinson, R C2 - CHI 2004 Extended Abstracts, , LA DA - 2004-04-01 00:04:00 LA - en PB - CHI 2004 Extended Abstracts, , LA PY - 2004 TI - Evaluating Interactive Information Retrieval Systems: Opportunities and Challenges ER -