by: V. Iswaran
by: K. Krishnamurthy
by: Kaushik, P.
by: Pandey, R.N.,Dinesh Singh
by: D.K. Dasgupta
by: Shankar Lal
by: Sivasankaran, K. et al.
by: Hampson, G.F.
by: Jha, M.N.
by: Rinawma, P. et al.,
by: D.N. Chkravarty
by: Sati,V.P.
by: Baylis, H.A.
by: Singh, S.B.
by: K.S. Chark,I.S. Dua,K. K. Dhir
by: Fraser, F.C.
by: Gangwar B.,Gopakumar, V.
by: Avasthe, R