by (United States)K.Jamsa;by (United States)A.N.Schwartz; by (United States)K.Jamsa; (United States)H.Helms; by (United States)M.Zahn;by (United States)A.Nussbaum; by (United States)K.P.Kamthan;by (United States)H.H.Schaefer; by (United States)K.J.Smith;by (United States)R.M.Spiegel; by (United States)A.O.Barut;by (United States)A.O.Barut; by (United States)D.F.Falk;by (United States)A.E.Martin; by (United States)K.J.Laidler;by (United States)A.R.Cooper; by (United States)A.Bohm;by (United States)A.Bohm; by (United States)A.L.Sheff;by (United States)R.Swartz;