by (United Kingdom)W.Empson;by (United States)F.Rissover; by (United Kingdom)E.T.Copson;by (United States)F.John; by (United Kingdom)W.R.Ashby;by (United States)F.Csaki; by (United Kingdom)W.N.Sproson;by (United States)D.Ingram; by (United Kingdom)E.K.Brown;by (United States)P.W.Culicover; by (United Kingdom)F.A.Thompson;by (United States)R.L.Tokneim; by (United Kingdom)I.S.Simpson;by (United States)Noragh Jones; by (United Kingdom)W.Grassie;by (United States)W.Schnabel; by (United Kingdom)W.E.Parry;by (United States)A.O.Barut; by (United Kingdom)J.Bridge;by (United States)W.E.Boyce;