1980. 2013-06-13T13:55:36Z. 2013-06-26T19:51:05Z. Hillier, Donald E. The Survey : For sale by Branch of Distribution, U.S. Geological Survey, Denver, Colo. English. Public. Front Range (Colo. and Wyo.), Colorado, Douglas County, El Paso County, Elbert County, Fremont County, and Teller County.
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2001. 2002-06-01T04:00:00Z. 2023-02-11T04:46:16Z. Geological Survey (U.S.). The Survey ; For sale by USGS Information Services (Open-File Report Sales). English. Public. Front Range (Colo. and Wyo.).
1993. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Virginia, Appalachian Basin, Colorado, and Front Range (Colo. and Wyo.).
1979. 2013-06-13T13:46:52Z. 2013-06-26T19:51:05Z. Trimble, Donald E. U.S. Geological Survey. English. Public. Colorado, Colorado Springs Region, Castle Rock Region, and Front Range (Colo. and Wyo.).
2000. 2002-06-01T04:00:00Z. 2023-02-11T04:46:17Z. Geological Survey (U.S.). The Survey. English. Public. Front Range (Colo. and Wyo.). Proterozoic.
1955. 2018-04-18T20:01:23Z. 2018-09-05T19:37:05Z. Hunter, Zena M. Rocky Mountain Association of Geologists. English. cartographic image. Public. Front Range (Colo. and Wyo.), United States, and Front Range.
1993. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Colorado, Greeley Region, and Front Range (Colo. and Wyo.).
1976. 2013-06-13T13:42:21Z. 2013-06-26T19:51:05Z. Adams, D. Briane. The Survey. English. Public. Front Range (Colo. and Wyo.), Colorado, Douglas County, El Paso County, Elbert County, Fremont County, and Teller County.
1975. 2013-06-13T13:28:34Z. 2013-06-26T19:51:04Z. Driscoll, Linda B. The Survey. English. Public. Front Range (Colo. and Wyo.), Colorado, Douglas County, Elbert County, El Paso County, Fremont County, and Teller County.
1975. 2013-06-13T13:36:51Z. 2013-06-26T19:51:05Z. Anna, Lawrence O. The Survey. English. Public. Colorado, Douglas County, Front Range (Colo. and Wyo.), El Paso County, Elbert County, Fremont County, and Teller County.