by (India)V.K.Sharma;by (United States)H.T.Verstappen; by (India)N.S.Khare;by (United States)P.Lorrain; by (India)D.L.Sehgal;by (United States)E.M.Purcell; by (India)G.S.Sobti;by (United States)M.C.Hutley; by (India)B.D.Gupta;by (United States)E.M.Loebl; by (India)M.A.W.Miah;by (United States)D.C.Stinson; by (India)N.P.Chaudhuri;by (United States)B.W.Jones; by (United States)M.H.Muncheryan;by (United States)J.T.Verdeyen; by (United States)A.L.Mcwhorter;by (United States)H.F.Tiersten; by (India)R.Singh;by (United States)Bruce L.Bennett;