By Komaraju Venkata Lakshmana Rao
By Vakkantam Suryanarayana Rao
By Kommineni Srinivasrao
By .
By Sri Rangam Subbarao , Sri Ramamurthy Sodarulu
By Sri Poluri Koundinya
By Dr. Sripada Pinakapani
By Kondapalli Venkateswarlu
By Sri Sasrswatula Subbarama Sastry
By Dr T S Rao
By Sri Nori Gurulinga Sastry
By A N Nageswara Rao
By Dr Manjuluri Narasimharao
By Tadanki Venkata Lakshmi Narasimha Rao
By V.V.Ramarao
By Paul De Kruif And Translated By Jammi Koneti Rao
By Carl Sagan And Translated By V.Srinivasa Chakravarthy
By Bhimeswarao Vemavarapu
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