by (United Kingdom)A.D.Gordon;by (United States)H.Heyer; by (United Kingdom)A.Dodd;by (United States)T.Jech; by (United Kingdom)A.J.Thomson;by (United States)C.Wheeler; by (United Kingdom)A.I.Vogel;by (United States)W.Kemp; by (United Kingdom)Z.G.Szabo;by (United States)H.Kelm; by (United Kingdom)A.E.Schoflon;by (United States)G.E.Myers; by (United Kingdom)C.Krone;by (United States)H.Keller; by (United Kingdom)G.Longworth;by (United States)H.Bender; by (United Kingdom)A.J.T.Colin;by (United States)T.Cope; by (United Kingdom)D.W.Jordan;by (United States)H.S.Carslaw;