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1972. 2013-04-17T20:19:23Z. 2013-05-02T15:44:47Z. Schmidt, Paul W. U.S. Geological Survey. English. Public. Colorado, Jefferson County, and Jefferson County (Colo.).
3. Slope map of the Parker quadrangle, Arapahoe and Douglas Counties, Colorado [cartographic material]
1972. 2013-02-21T16:40:27Z. 2013-03-18T20:56:37Z. Maberry, John O., 1935-. U.S. Geological Survey. English. Public. Colorado, Arapahoe County, and Douglas County.