by (USSR)D.N.Trifonov;by (United States)L.K.Williams; by (USSR)N.B.Vasllyev;by (United States)L.C.Washington; by (USSR)K.Spidchenke;by (United Kingdom)T.R.Williams; by (USSR)A.Simonova;by (United States)Dean R.Snow; by (USSR)K.Kuratowski;by (United States)L.P.Maher; by (USSR)L.Dobrzynski;by (United States)D.F.Brewer; by (United States)J.S.Vandergraft;by (United States)P.W.Williams; by (USSR)N.N.Bogoliubov...et al;by (United States)L.M.Garrido; by (United States)A.J.Meadows;by (United States)Wayne C.McWilliams; by (USSR)I.Duncan; (United States)C.Payne;