by (United Kingdom)H.J.Goldsmid;by (USSR)A.M.Prokhorov; by (United Kingdom)D.L.Johnson;by (USSR)M.I.Kargaplov; by (United Kingdom)B.R.Nanda;by (USSR)G.E.Pavlova; by (United Kingdom)C.Taylor;by (USSR)D.N.Trifonov; by (United Kingdom)J.L.Bell;by (USSR)W.Marek; by (United Kingdom)J.J.O'Keefe;by (USSR)N.B.Zucova; by (United Kingdom)L.W.Giggins;by (USSR)A.Y.Lebedeva; by (United Kingdom)C.Swatridge;by (USSR)F.B.Kedrov; by (United Kingdom)R.Best;by (USSR)R.Baker; by (United Kingdom)I.R.Sinclair;by (USSR)I.V.Savelyev;