by (USSR)I.A.Rrezanov;by (United States)N.C.Barford; by (USSR)S.P.Strelkov;by (United States)V.I.Arnold; by (USSR)I.S.Dmitriev;by (United States)J.A.Kerr; by (USSR)D.N.Trifonov;by (United States)L.K.Williams; by (USSR)A.M.Prokhorov;by (United States)M.A.Omar; by (USSR)M.Prives;by (United States)N.S.Sahana; by (USSR)A.Ramakrishnan;by (United States)C.Harper; by (USSR)N.V.Efimov;by (United States)M.J.Kallaher; by (USSR)E.A.Kornejeva;by (United States)Ona Low; by (USSR)I.Duncan; (United States)C.Payne;