The Martian landscape

Viking Lander Imaging Team.
Washington : Scientific and Technical Information Office, National Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1978.

Scientific results of the Viking Project.

Washington : American Geophysical Union, [1977 or 1978]

Viking Mars expedition, 1976.

Denver, Colo. : Martin Marietta Corporation, [1978]

Viking orbiter views of Mars

Washington, D.C. : Scientific and Technical Information Branch, National Aeronautics and Space Administration : For sale by the Supt. of Docs., U.S. G.P.O., 1980.