Collaborative virtual environments : digital places and spaces for interaction / edited by Elizabeth F. Churchill, David N. Snowdon and Alan J. Munro. - xx, 316 pages : illustrations ; 24 cm. - Computer supported cooperative work . ISBN: 1852332441 Subjects--Topical Terms: Human-computer interaction.Virtual reality. LC Class. No.: QA76.9.H85 / .C64 2001