United States Department of Agriculture, Forest Service ; compiled at Regional Office, Albuquerque, N.M. from U.S.G.S., G.L.O., Forest Service, and other surveys, by F.E. Landon and B. Elliott, January, 1928, revised at Regional Office, 1937. Relief shown hachures. "Polyconic projection, North American datum." Prime meridian: Greenwich.
Creator:
United States, Forest Service., Southwestern Region.
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