National Aeronautics and Space Administration ; National Technical Information Service, distributor,
Diffuse emission and pathological Seyfert spectra [microform] : National Aeronuatics and Space Administration ROSAT annual status report for NAG 5-1935
ROSAT annual status report
[NASA contractor report] ;
Halpern, Jules P.
United States. National Aeronautics and Space Administration.
prepared by Columbia Astrophysics Laboratory, Departments of Astronomy and Physics, Columbia University ; principal investigator, Jules P. Halpern.
Diffuse emission and pathological Seyfert spectra [microform] : National Aeronuatics and Space Administration ROSAT annual status report for NAG 5-1935