Wyoming-Colorado, Encampment special map /
Geological Survey (U.S.)
Douglas, E. M.(Edward Morehouse),1855-1932.
Tweedy, Frank.
[Washington, D.C.] : The Survey,
1903.
Relief shown by contours and spot heights.
"Surveyed in 1901."
"Datum is mean sea level."
Includes township diagram.
Text on verso.