by (United Kingdom)M.J.B.Themson;by (United States)J.Buckingham; by (United Kingdom)A.J.Thomson;by (United States)C.Wheeler; by (United Kingdom)M.A.Munem;by (United States)S.Maclane; by (United Kingdom)M.J.C.Echeruo;by (United States)M.H.Abrams; by (United Kingdom)M.Sachs;by (United States)R.Skinner; by (United Kingdom)C.W.Thomas;by (United States)J.J.Sullivan; by (United Kingdom)H.J.Sachs;by (United States)J.G.Roloff; by (United Kingdom)M.I.Klinger;by (United States)A.M.Stoneham; by (United Kingdom)M.K.Starkman;by (United States)L.Trilling; by (United Kingdom)M.R.M.Rao;by (United States)W.T.Reid;