TY  - BOOK
AU  - Grady,Sean M.
TI  - Virtual reality: computers mimic the physical world 
SN  - 8173713456 (pbk) :
U1  - 006 
PY  - 2000///
CY  - New Delhi
PB  - Universities Press
KW  - Human-computer interaction
KW  - Juvenile literature
KW  - Virtual reality
N1  - Glossary : p. 156-166; Includes bibliographical references and index
ER  -