by (United States)C.Drentea;by (United Kingdom)A.E.Schoflon; by (United States)J.P.Kennett;by (United Kingdom)T.J.M.Schopf; by (United States)L.Zechmeister;by (United Kingdom)J.E.Saxton; by (United States)C.Marlowe;by (United Kingdom)C.Marlowe; by (United States)D.Daiker;by (United Kingdom)A.S.Hornby; by (United States)R.Dubos;by (United Kingdom)A.G.Eyre; by (United States)S.Siggia;by (United Kingdom)A.I.Vogel; by (United States)M.A.Leontovich;by (United Kingdom)A.G.Sitenko; by (United States)J.D.Mcgervey;by (United Kingdom)C.Schaerf; by (United States)C.A.Bergman;by (United Kingdom)R.A.Close;