By Vakkalanka Venkataramana
R.Natarajan (Prapancha Vaignanika Kathalu)
Parragon
Bhupati Rama Rao
E.Kommaraiah
Nisha Malhotra
Pro. N.Venugopala Rao And Pro. K.Satya Prasad
M.Stoliar And L.Fomin (Translated By K.V.S.Gnaneswara Rao)
Balala Science Vignanam
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