| ชื่อเรื่อง | VRST'99 : proceedings of the ACM Symposium on Virtual Reality Software and Technology, December 20-22nd 1999, University College London, Gower Street, London, UK / edited by Mel Slater ; sponsored by ACM SIGGRAPH and ACM SIGCHI, also sponsored by the European ACTS Project COVEN: Collaborative Virtual Environments, additional sponsorship from SGI and Virtual Presence Ltd |