Identification of a Complete Sample of Northern ROSAT All-Sky Survey X-Ray Sources Krautter, J. ; Thiering, I. ; Zickgraf, F. -J. ; Appenzeller, I. ; Kneer, R. ; Voges, W. ; Serrano, A. ; Mujica, R. Abstract Publication: New Horizons from Multi-Wavelength Sky Surveys Pub Date: 1998 Bibcode: 1998IAUS..179..449K