HEAO-1 Observations of 4U1626-67 Pravdo, S. H. ; Boldt, E. A. ; Holt, S. S. ; Rothschild, R. E. ; Serlemitsos, P. J. ; Swank, J. H. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1978 Bibcode: 1978BAAS...10..446P