By Dr. B V Pattabhiram
By Kasina Venkateswara Rao
By Bommakanti Srinivasacharyulu
By Madduri Padmavathi Vajjulu
By Padmaja Srinivas
By Ganti Suryanarayana
By Dr.Galli Bala Sundara Rao
By Nom Chamsky And Translated by Mukavaram Pardhasaradhi
By G.K Gupta
By .
By Kodidasu Subhadra
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