Author: Sheridan, Douglas M., 1921- - Yale University Library GeoBlacklight Search Results

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1. Geologic map of the Evergreen quadrangle, Jefferson County, Colorado [cartographic material]

1972. 2013-04-17T20:12:24Z. 2013-05-02T15:44:46Z. Sheridan, Douglas M., 1921-. U.S. Geological Survey. English. Public. Colorado and Jefferson County.

2. Geologic map of the Squaw Pass quadrangle, Clear Creek, Jefferson, and Gilpin counties, Colorado [cartographic material]

1976. 2012-05-23T19:40:22Z. 2012-06-07T16:55:00Z. Sheridan, Douglas M., 1921-. The Survey. English. Public. Colorado, Clear Creek County, Jefferson County, and Gilpin County.

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