Further Observations of Pulsating Hard X-Ray Sources by HEAO-1 Doty, J. P. ; Howe, S. K. ; Dobson, C. A. ; Wheaton, W. A. ; Lewin, W. H. G. ; Matteson, J. L. ; Nolan, P. ; Knight, F. K. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1978 Bibcode: 1978BAAS...10..685D