MARRIN (C) / CAMPBELL (B), . (1997). Teach Yourself VRML 2 in 21 days. New Delhi: Techmedia New Delhi.
MARRIN (C) / CAMPBELL (B), . 1997. Teach Yourself VRML 2 in 21 days. New Delhi: Techmedia New Delhi.
MARRIN (C) / CAMPBELL (B), . Teach Yourself VRML 2 in 21 days. New Delhi: Techmedia New Delhi. 1997.
