by (United States)G.G.Guilbault;by (United States)L.F.Hamilton; by (United States)L.A.Hill;by (United States)L.A.Hill; by (United States)L.P.Huolsman;by (United States)H.F.Harmuth; by (United States)G.Muller;by (United States)L.E.Hawker; by (United States)B.R.Gulati;by (United States)G.Gratzer; by (United States)C.W.Helstrom;by (United States)H.F.Hameka; 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)G.V.Rao;by (United States)P.E.Burton; by (United States)L.A.Hill;by (United States)T.Harris;