by (USSR)A.M.Prokhorov;by (United States)M.A.Omar; by (USSR)A.V.Efimov;by (United States)M.Mandl; by (USSR)V.Kostomarov;by (United States)B.Lott; by (USSR)V.S.Vladimirov;by (United States)A.G.Webster; by (USSR)A.Ramakrishnan;by (United States)C.Harper; by (USSR)N.V.Efimov;by (United States)M.J.Kallaher; by (USSR)A.I.Busev; (United States)G.L.Clark; by (USSR)A.Starkov;by (United States)K.Sandberg; by (USSR)A.V.Bitsadze;by (United States)F.Bloom; by (USSR)M.Prives;by (United States)N.S.Sahana;