by (United Kingdom)C.W.Pannell;by T.N.Chin; by (United Kingdom)C.Taylor;by (USSR)D.N.Trifonov; by (United Kingdom)J.D.Ullman;by (India)B.N.Chakrabarty; by (United Kingdom)C.N.Banwell;by (United States)G.Herzberg; by (United Kingdom)C.W.E.Kirk-Greene;by (France)R.Olivier; by (United Kingdom)C.Went;by (United States)P.Zuman;