By Balala Science Vignanam
Alla Apparao
Parragon
P.Lakshmi Devi
Bhupati Rama Rao
K.Sadasiva Rao
Velaga Venkatappaiah
D.S.Triphonov
Yakov Perelman (Translated By Dr. K.B.Gopalam)
Balala Science Vignanam
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