Aspen Atlas Sheet.
Aspen Atlas Sheet. Sheet IV Topography. U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. F.M. Douglas, Topographer in charge. Triangulation by E.M. Douglas. Topography by R.C. McKinney. Surveyed in 1893. Julius Bien & Co. Lith. N.Y. (1898)
David RumseySpurr, Josiah Edward
1898
1898
United States Geological Survey
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