NASA's High Energy Astronomy Observatory (HEAO) ... satellites.
Contributors: United States. Office of Space Science.
Publisher: National Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1976
Place of publication: [Washington]
Language: eng
Subjects: Orbiting astronomical observatories -- Posters.; Scientific satellites -- Posters.