1968. 2012-02-20T18:28:46Z. 2018-02-14T14:18:07Z. Gildersleeve, Benjamin, 1907-2003. U.S. Geological Survey. English. Public. Kentucky, Edmonson County, and Grayson County.
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2. Geologic map of the Quality quadrangle, Butler and Logan Counties, Kentucky [cartographic material]
1968. 2012-01-23T18:15:32Z. 2018-02-14T14:18:46Z. Gildersleeve, Benjamin, 1907-2003. U.S. Geological Survey. English. Public. Kentucky, Butler County, and Logan County.
