By Ranganatha Ramachandra Rao
By V.G.Afanasyev (Translated By Y.Vijay Kumar - Nidamarthy Umarajeswara Rao - B.Ramachandra Rao)
By Dwibhashyam Subramanya Sarma
By Dr. Gudipati V.R.R.Prasad
By Dr Mahidhar Barla
By Manchala Jagannadha Rao
By Dr M Harikishan
By Choudavarapu Krishna Murthy
By Achanta Saradadevi
By Mangari Rajender
By R.Umamaheswari
By Kondepudi Lakshmi Narayana
By Guntur Kumara Lakshmanasastry
By Malladi Venkata Krishnamurthy
By Dr K Aravinda Rao
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