1973. 2012-04-10T14:01:53Z. 2012-04-16T15:50:31Z. Roehler, Henry W. The Survey. English. Public. Colorado and Garfield County.
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2. Geologic map of the Henderson Ridge quadrangle, Garfield County, Colorado [cartographic material]
1973. 2012-04-13T14:24:28Z. 2012-04-16T15:57:15Z. Roehler, Henry W. The Survey. English. Public. Colorado and Garfield County.
