by (USSR)G.E.Pavlova;by (USSR)A.S.Fedorov;by (USSR)G.Pavlova; by (USSR)G.Pavlova;by (USSR)A.S.Fedorov;by (USSR)Nikolai Tolstoy; by (USSR)G.N.Yakovlev;by (USSR)V.A.Kudryavtsev; by (USSR)M.S.Feld;by (USSR)V.S.Letokhov;by (United Kingdom)P.G.Harper;