Author: Raju, V.B.
Publisher:Eastern Book Co
Copyright:1971
Author: Duff, James Grant
Publisher:Associated Publishing House, New Delhi
Copyright:1971
Author: Lal, Ramji
Publisher:Ajanta Publications, New Delhi
Copyright:1986
Author: Srinivasachariar, A.M.
Publisher:G.A. Natesan, Madras
Copyright:2000