by Mithani, D. M. and Murthy, V.S.R.
by Mishra, S. K. & Puri, V. K.
by Sivayya, K. V. ; Rao, M. G. & Rao, V. S. P.
by Khedkar, V. B.
by Mithani, D.M.
by Chitampalli, Maruti.
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