Aspen District.
Aspen District. Sheet V 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
1:31 000