Location of Unidentified Galactic X-ray Sources with the HEAO-1 Scanning Modulation Collimator Reid, C. ; Johnston, M. D. ; Bradt, H. ; Doxsey, R. ; Schwartz, D. A. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1979 Bibcode: 1979BAAS...11..451R