Aspen Special.

Aspen Special. Sheet VIII Topography. U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. Morris Bien, Topographer in charge. Triangulation by Morris Bien. Topography by F.F. Grove. Surveyed in 1891. Julius Bien & Co. Lith. N.Y. (1898)

Spurr, Josiah Edward

1898

1898

United States Geological Survey

1:9 600

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