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1911. 2021-07-29T17:32:09Z. 2021-07-29T17:32:09Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Garfield County (Colo.), Mesa County (Colo.), De Beque (Colo.), Colorado, Garfield County, Mesa County, De Beque., Garfield County., and Mesa County.
1987. 2010-10-18T17:23:47Z. 2010-10-18T17:23:47Z. Burroughs, Dolores. The Survey. English. Public. Alabama.
1942. 2012-06-21T13:48:32Z. 2012-06-29T20:46:34Z. Geological Survey of Canada. The Survey. English. Public. Ontario and Middlesex.
1922. 2013-01-22T15:25:48Z. 2015-10-21T15:09:12Z. Geological Survey (U.S.). The Survey. English. Public. Kentucky.
1922. 2010-09-20T17:28:26Z. 2015-10-27T22:25:52Z. Geological Survey (U.S.). The Survey. English. Public. West Virginia.
1970. 2013-12-20T19:45:55Z. 2014-01-23T00:06:43Z. Ball, N. L. The Survey. English. Public. Canada.
1979. 2014-07-02T19:59:43Z. 2014-07-02T19:59:43Z. Drew, Lawrence J. The Survey. English. Public. Denver Basin, United States, and Denver Basin.
