by (United Kingdom)A.Abragam;by (United States)M.Baranger; by (United Kingdom)A.Adams;by (United Kingdom)D.Brown; by (United Kingdom)A.Dodd;by (United States)T.Jech; by (United Kingdom)A.D.Gordon;by (United States)H.Heyer; by (United Kingdom)A.F.Dyer;by (United States)J.Morrow; by (United Kingdom)A.Sharp;by (United States)A.L.Sonka; by (United Kingdom)A.Jennings;by (United States)R.C.Ward; by (United Kingdom)A.Gurr;by (United Kingdom)A.Gurr; by (United Kingdom)A.Milner;by (United Kingdom)B.Ford; by (United Kingdom)A.Cotterell;by (United States)W.Mieder;