1965. 2012-09-27T19:18:55Z. 2013-03-18T22:20:21Z. Freeman, Val L., 1926-. U.S. Geological Survey. English. Public. Texas and Val Verde County.
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2. Geologic map of the Ruedi quadrangle, Pitkin and Eagle Counties, Colorado [cartographic material]
1972. 2012-03-26T14:01:39Z. 2012-05-03T15:31:54Z. Freeman, Val L., 1926-. U.S. Geological Survey. English. Public. Colorado, Pitkin County, and Eagle County.