by (United States)Margaret Craven;by (USSR)Битехтиной Г.А.; by (United States)Margaret Walker;by (United States)Jacqueline Austin; by (United States)M.E.Harr;by (USSR)S.G.Lekhnitskii; by (United States)Marfaret W.Matlin;by (United States)Susan Strane; by (United States)L.Ingvar...et al;by (USSR)A.I.Kitaigoredsky; by (United States)M.Braun...et al;by (USSR)R.V.Ambartzumian;