by (United States)R.Skirble;by (United States)L.Schinke-Llano; by (United States)R.Lado;by (United States)L.McClelland; by (United States)R.Swartz;by (United States)W.Strunk; by (United States)H.Skolnik;by (United States)L.Salen; by (United States)P.Suppes; (United States)R.Shankar; by (United States)L.A.Hill;by (United States)L.A.Hill; by (United States)E.G.Brame;by (United States)L.H.Peebles; by (United States)G.Strang;by (United States)L.Smith; by (United States)R.M.Spiegel;by (United States)L.W.Voxman; by (United States)R.S.Chang;by (United States)B.C.Lipman;