[Huntsville, Ala.] : [National Aeronautics and Space Administration, George C. Marshall Space Flight Center] ; Washington, D.C. : for sale by the Supt. of Docs., U.S. Govt. Print. Off., [1979]
IAU Colloquium (25th : 1974 : Goddard Space Flight Center)
Washington : Scientific and Technical Information Office, National Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976.