1980. 2012-06-25T15:02:42Z. 2012-07-05T13:02:55Z. Shroba, R. R. The Survey. English. Public. Colorado, Denver, Arapahoe County, and Adams County.
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2. Geologic map of the Sable quadrangle, Adams and Denver Counties, Colorado [cartographic material]
1983. 2012-06-27T19:45:35Z. 2012-07-05T13:04:21Z. Lindvall, Robert M. (Robert Marcus), 1916-. The Survey. English. Public. Colorado, Adams County, and Denver.