A Study of Pulsing X-Ray Sources Naranan, S. ; Darbro, W. ; Elsner, R. F. ; Leahy, D. ; Weisskopf, M. C. ; Sutherland, P. G. ; Grindlay, J. E. ; Kahn, S. M. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1981 Bibcode: 1981BAAS...13..866N