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.
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1975. 2013-05-30T20:01:30Z. 2013-06-14T17:58:36Z. Driscoll, Linda B. Dept. of the Interior, U.S. Geological Survey. English. Public. Colorado, Denver Metropolitan Area, and Denver Metropolitan Area (Colo.).
