1. Anonymous: Biology,An Inquiry into Life. Vol. 2, tata McGraw Hill Publishing Co., Delhi (1971).
2. Basham, A.L.: Foeward P-IX. In:Hindu Epics Myths and Legends in popoular illustrationby V.G. vitasaxis, Oxford University pressw, Delhi (1977).
3. Bernard, T.Hindu Phiolosophy, Jaico Publishing House, Bombay (1989).
4. Buhler, G.: The Laws of Manu. In:The Sacred books of the East XXV, F. Max Muller (Ed.). Oxford at the Clarindon press, London (1986).
5. Capra, F.The Tao of Physics. Flamingo Harper Collins Publishers (1975) (1991 reprint).