by (United States)Andrew Jenkins;by (United Kingdom)R.John; by (United States)D.David;by (United Kingdom)R.Fox; by (United States)E.Kreyszig;by (United Kingdom)R.J.Leigh; by (United States)J.C.Blumenthal;by (United Kingdom)R.Best; by (United States)F.B.Hildebrand;by (United Kingdom)L.W.Johnson; by (United States)D.E.Johnson;by (United Kingdom)M.James; by (United States)E.Geoldin; (United Kingdom)R.Loudon; by (United States)M.Gross;by (United Kingdom)R.Gower; by (United States)N.A.Berkoff;by (United Kingdom)R.Barne; by (United States)P.M.Chirlian;by (United Kingdom)R.King;