by (United Kingdom)R.E.Parker;by (United States)D.F.Falk; by (United Kingdom)N.E.Parker;by (United States)G.B.Ryvicki; by (United Kingdom)W.E.Parry;by (United States)A.O.Barut; by (United Kingdom)R.Barne;by (United States)S.Baker; by (United Kingdom)R.Yorke;by (United States)S.Seshu; by (United Kingdom)R.D.Milne;by (United States)A.W.Naylor; by (United Kingdom)R.N.Hardy;by (United States)K.M.Lyons; by (United Kingdom)R.T.Fenner;by (United States)B.Irons; by (United Kingdom)R.Quirk;by (United States)B.Evans; by (United Kingdom)R.A.Smith;by (United States)T.S.Moss;