Spectra of the Crab Nebula, AM HER, and Nova Ophiuchi from HEAO-1. Rothschild, R. ; Gruber, D. ; Knight, F. ; Matteson, J. ; Nolan, P. ; Marshall, F. ; Swank, J. ; Reigler, G. ; Touhey, I. ; Charles, P. ; Lampton, M. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1977 Bibcode: 1977BAAS....9..609R