By Narendrakumar
By Malladi Venkata Krishna Murthy
By Dwibhashyam Subrahmanya Sarma
By Malladi Venkata Krishnamurthy
By K P Ashok Kumar
By V.G.Afanasyev (Translated By Y.Vijay Kumar - Nidamarthy Umarajeswara Rao - B.Ramachandra Rao)
By Guntur Kumara Lakshmanasastry
By Ethakota Subbarao
By Dr K Aravinda Rao
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