by (United States)P.E.Tippens;by (United Kingdom)R.L.Murray; by (United States)R.Larsen;by (United Kingdom)R.D.Milne; by (United States)F.J.Tipler;by (United Kingdom)S.W.Hawking; by (United States)S.P.Parker;by (United Kingdom)R.E.Parker; by (United States)H.T.Verstappen;by (United Kingdom)R.J.Small; by (United States)P.L.Duren;by (United Kingdom)P.Koosis; by (United States)R.Musman;by (United Kingdom)R.Musman; by (United States)C.A.Bergman;by (United Kingdom)R.A.Close; by (United States)J.I.Steinfeid;by (United Kingdom)R.C.Denney; by (United States)J.Carter;by (United Kingdom)R.Miller;