(1985). David Hatcher Childress , Vimana Aircraft of Ancient India , Adventures Unlimited Press (1991), ISBN 0932813127 [ edit ]External links Flights of fancy? , The Week , 24 June 2001. Vaimanika Shastra Rediscovered UFOs and Vimanas by Stephen Knapp Hindu Wisdom - Vimanas Ancient Flying Machines Vimanika Shastra / Vymaanika Shaastra