1. 1
    Published 1968
    ...[For sale by the Supt. of Docs., U.S. Govt. Print. Off.],...
    Book
  2. 2
    Published 1967
    ...[For sale by the Supt. of Docs., U.S. Govt. Print. Off.],...
    Book
  3. 3
    by El-Baz, Farouk
    Published 1977
    ...Smithsonian Institution Press : for sale by the Supt. of Docs., U.S. Govt. Print. Off,...
    Book
  4. 4
    by Cortright, Edgar M.
    Published 1968
    ...Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.],...
    Book