AGN and X-ray Luminous Galaxies in Deep ROSAT Surveys Griffiths, R. E. ; della Ceca, R. ; Boyle, B. J. ; Georgantopoulus, I. ; Stewart, G. C. ; Shanks, T. Abstract Publication: New Horizon of X-Ray Astronomy. First Results from ASCA Pub Date: January 1994 Bibcode: 1994nhxr.conf..605G