By V.G.Afanasyev (Translated By Y.Vijay Kumar - Nidamarthy Umarajeswara Rao - B.Ramachandra Rao)
By Dr Pedapati Nageswarao
By Manchala Jagannadha Rao
By Deevi Subbarao
By Ethakota Subbarao
By Malladi Venkata Krishna Murthy
By Malladi Venkata Krishnamurthy
By Dr K Aravinda Rao
By V Rajaram Mohanrao
By Sri Gundu Venkateswara Rao Garu
By Vemuri Srinivasarao
By K Nageswara Rao And V Aswin Kumar
By Toleti Jaganmohanrao
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