by (United States)L.H.Peebles;by (United Kingdom)G.Scott; by (United States)H.P.Baltes;by (United Kingdom)M.Born; by (United States)P.J.Hilton;by (United Kingdom)D.G.Northcott; by (United States)M.M.Bryant;by (United Kingdom)D.Crystal; by (United States)Bruce L.Liles;by (United Kingdom)G.Leech; by (United States)J.Gillespie;by (United Kingdom)T-P.Cheng; by (United States)D.H.Perkins;by (United Kingdom)D.H.Perkins; by (United States)F.E.Clese;by (United Kingdom)P.D.B.Collins; by (United States)H.B.Zackrison;by (United Kingdom)M.Slesser; by (United States)J.C.Slater;by (United Kingdom)G.K.Woodgate;