1891. 2011-05-17T18:29:36Z. 2015-10-21T14:59:21Z. Geological Survey (U.S.). The Survey. English. Public. Chaffee County (Colo.), Eagle County (Colo.), Lake County (Colo.), Park County (Colo.), Pitkin County (Colo.), and Summit County (Colo.).
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1911. 2011-05-17T19:20:44Z. 2015-10-21T14:59:22Z. Geological Survey (U.S.). The Survey. English. Public. Chaffee County (Colo.), Eagle County (Colo.), Gunnison County (Colo.), Lake County (Colo.), and Pitkin County (Colo.).
1930. 2018-05-15T19:50:48Z. 2022-12-08T04:43:49Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Lake County (Colo.), Colorado, Lake County, and Lake County.