EGRET Observation in High Energy Gamma Rays of Seyfert Galaxies Selected According to X-Ray Fluxes Lin, Y. C. ; Michelson, P. F. ; Nolan, P. L. ; Bertsech, D. L. ; Dingus, B. L. ; Fichtel, C. E. ; Hartman, R. C. ; Hunter, S. D. ; Mattox, J. R. ; Sreekumar, P. ; Thompson, D. J. ; Kanbach, G. ; Mayer-Hasselwander, H. A. ; von Montigny, C. ; Pinkau, K. ; Schneid, E. ; Kniffen, D. A. Abstract Publication: American Astronomical Society Meeting Abstracts Pub Date: September 1992 Bibcode: 1992AAS...18110602L