By Balala Science Vignanam
Yakov Perelman (Translated By Dr. K.B.Gopalam)
Parragon
Pro. N.Venugopala Rao And Pro. K.Satya Prasad
D.S.Triphonov
Kappagantula Raja Rama Mmohan Babu
P.Lakshmi Devi
C.V.Sarveswara Sarma
Dr.Bose
Balala Science Vignanam
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