Author: Davis, Calvin Victor Sorensen, Kenneth E.
Publisher:McGraw-Hill Book, New York
Copyright:1969
Author: Yadav, J.N. Singh
Publisher:Manohar Book Service, New Delhi
Copyright:1976
Author: Beebe,Frank L.
Publisher:Hancock House Publications,Saanichton.
Copyright:1976
Author: Benson, Jackson J.
Publisher:University of Minnesota Press Minneapolis
Copyright:1969
Author: Siddhantalankar, Satyavrata Taraporevala, S. J,
Publisher:D B Taraporevala Sons & Co. Pvt. Ltd., Bombay
Copyright:1969
Author: Heber,A. R. Heber,Kathleen M
Publisher:Ess Ess Publ.,Delhi
Copyright:1976
Author: Devaraja, N. K. [Nand Kishore]
Publisher:Asia Publishing House, Bombay
Copyright:1969
Author: Law, Bimala Churn
Publisher:Ess Ess Publication, Delhi
Copyright:1976
Author: Majumdar, R C
Publisher:Bharatiya Vidya Bhavan, Bombay
Copyright:1969
Author:
Publisher:George Allen & Unwin, London
Copyright:1976
Author: Gottschalk, Louis Mackinny, Loren C. Pritchard, Earl H.
Publisher:International Commission for a History of the Scientific and Cultural Development of Mankind. London
Copyright:1969
Author: Reber, Franz Von
Publisher:J.&J. Harper Editions, New York
Copyright:1969
Author: Sitaramayya, B. Pattabhi
Publisher:S. Chand & Co., Delhi
Copyright:1969
Author: Lalnithanga, P.
Publisher:The ZOram Press, Aizawl.
Copyright:1983
Author: Jog,Narayan Gopal
Publisher:Orient Longmans, Bombay
Copyright:1969