by (United Kingdom)T.D.Lee;by (United States)G.D.Mahan; by (United Kingdom)J.D.Lenk;by (United States)B.Beizer; by (United Kingdom)G.N.Leech;by (United States)L.McCleand; by (United Kingdom)D.Mayr;by (United States)H.C.Ohanian; by (United Kingdom)S.Lang;by (United States)J.D.Mancill; by (United Kingdom)A.Lande;by (United States)G.Ludwig; by (United Kingdom)T.C.Gibb;by (United States)E.Hecht; by (United Kingdom)H.M.Hulme;by (United States)J.D.Huston; by (United Kingdom)R.D.Milne;by (United States)A.W.Naylor; by (United Kingdom)D.Rowntree;by (United States)G-C.Rota;