Author: Samuelson, Paul Anthony
Publisher:Harvard University Press, Cambridge
Copyright:1966
Author: Shetty, K. P. Krishna
Publisher:Chaitanya Publishing House, Allahabad
Copyright:1966
Author: Cartwright, F. C.
Publisher:Sampson Low Marston, London
Copyright:1937
Author: Thesing, Curt
Publisher:Emerson Books, Inc., New York
Copyright:1937
Author: Brockelmann, C
Publisher:E J Brill, Leiden
Copyright:1937
Author: Mariacher, Giovanni
Publisher:The Hamyln Publishing Group, London
Copyright:1966
Author: Churchill, Winston S.
Publisher:Thornton Butterworth Ltd, London
Copyright:1937
Author: Tsuda, Noritake
Publisher:Geogre allen and Unwin,London
Copyright:1937
Author: Seshadri, P.
Publisher:Vedic Yantralaya, Ajmer
Copyright:1937