Observations of Quasi-Periodic Oscillations from GX 5-1 with the Einstein (HEAO-2) Observatory Elsner, R. F. ; Weisskopf, M. C. ; Darbro, W. ; Miyaji, S. ; Ramsey, B. ; Williams, A. C. ; Sutherland, P. G. ; Grindlay, J. E. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1985 Bibcode: 1985BAAS...17..854E