1966. 2012-01-18T15:41:58Z. 2012-03-05T17:34:16Z. Ulrich, George E. U.S. Geological Survey. English. Public. Kentucky, Trigg County, and Christian County.
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1966. 2012-01-13T15:34:29Z. 2012-03-05T17:32:55Z. Ulrich, George E. U.S. Geological Survey. English. Public. Kentucky and Christian County.
3. Geologic map of the Olmstead quadrangle, Todd and Logan Counties, Kentucky [cartographic material]
1966. 2012-01-13T15:26:59Z. 2012-03-05T17:32:55Z. Ulrich, George E. U.S. Geological Survey. English. Public. Kentucky, Todd County, and Logan County.
1966. 2011-12-20T19:54:13Z. 2012-03-05T17:26:46Z. Ulrich, George E. U.S. Geological Survey. English. Public. Kentucky, Todd County, and Logan County.
