By Narendrakumar
By Dwibhashyam Subrahmanya Sarma
By Malladi Venkata Krishna Murthy
By Malladi Venkata Krishnamurthy
By Ranganatha Ramachandra Rao
By V.G.Afanasyev (Translated By Y.Vijay Kumar - Nidamarthy Umarajeswara Rao - B.Ramachandra Rao)
By Dr Pedapati Nageswarao
By Dr. Gudipati V.R.R.Prasad
By Dr Mahidhar Barla
By Dr M Harikishan
By Dr. Parimala Someswar
By Kondepudi Lakshmi Narayana
By Guntur Kumara Lakshmanasastry
By Dr K Aravinda Rao
By Chadralata
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