HEAO-1 spectra of x-ray emitting Seyfert I galaxies
By: R.F. Mushotzky ... [et al.].
Series: NASA technical memorandum -- 80554
Publisher: Goddard Space Flight Center
Published: 1979
Place of publication: Greenbelt, Md
Language: eng
Number of pages: 11
Subjects: X-ray sources, Galactic; Spectra; High Energy Astronomy Observatories
Notes: Title from cover.

"August 1979."

Includes bibliographical references.