1987. 2012-07-05T15:32:03Z. 2012-07-05T15:32:03Z. Dickinson, R. G. (Robert G.). U.S. Geological Survey. English. Public. Colorado, Gunnison County, Montrose County, and Ouray County.
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1987. 2002-06-01T04:00:00Z. 2012-07-11T15:29:47Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Colorado and Gunnison County.
1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Colorado, Delta County, and Gunnison County.
1987. 2002-06-01T04:00:00Z. 2012-07-05T15:41:13Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Colorado, Gunnison County, Montrose County, and Ouray County.