by (United States)P.D.Hemphill;by (United States)K.Hill-Miller; by (United States)P.L.Henneguin;by (United States)M.Loeve; by (United States)P.R.Halmos;by (United States)T.Kato; by (United States)P.W.Williams;by (United States)R.Wait; by (United States)P.D.Edmonds;by (United States)H.F.Meiners; by (United States)C.O.Harris;by (United States)P.E.Popov; by (United States)P.D.McCormack;by (United Kingdom)D.Tabor; by (United States)P.Dunn-Rankin;by (United States)D.Urdang; by (United States)P.Ribenboim;by (United States)T.Banchoff; by (United States)J.D.Hart;by (United States)P.B.High;