by (USSR)N.N.Bogoliubov...et al;by (United States)L.M.Garrido; by (USSR)J.L.Nowinski...et al;by (United States)M.E.Harr; by (USSR)A.A.Sokolov...et al;by (United States)P.Suppes; by (USSR)Y.G.Panovko...et al;by (United States)D.R.J.Owen; by (USSR)T.K.Veselovskaya...et al;by (United States)M.Orchin; by (USSR)V.B.Berestetskii...et al;by (United States)P.Urban; by (USSR)A.I.Busev...et al;by (United States)R.W.Frei...et al; by (USSR)K.F.Pavlov...et al; (United States)H.F.Mark...et al; by (USSR)N.Piskunov;by (United States)J.M.Shapiro; by (United States)L.M.Lee...et al;by (United States)G.B.Barlin;