Triangulation Map of Colorado.

Triangulation Map of Colorado. By J.T. Gardner and A.D. Wilson. Department of the Interior, U.S. Geological and Geographical Survey of the Territories, F.V. Hayden, U.S. Geologist in Charge. Sheet I.

Hayden, F.V.

1881

1881

Department of The Interior. United States Geological and Geographical Surveys of the Territories.

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