by (United States)A.H.Bruinsma;by (United Kingdom)I.A.D.Lewis; by (United States)D.H.Perkins;by (United Kingdom)D.H.Perkins; by (United States)J.S.Kenyon;by (United Kingdom)J.W.Lewis; by (United States)L.B.Okun;by (United Kingdom)I.S.Towner; by (United States)R.J.Hurtubise;by (United Kingdom)M.D.Lumb; by (United States)A.A.Cohen;by (United Kingdom)I.S.Simpson; by (United States)A.Fine;by (United Kingdom)P.J.Fleming; by (United States)A.H.Live;by (United Kingdom)D.H.Lawrence; by (United States)A.O.Barut;by (United Kingdom)S.M.Blinder; by (United States)R.Burton;by (United Kingdom)I.G.Main;