1. Geologic map of the Roxana quadrangle, Letcher and Harlan counties, Kentucky [cartographic material]
1976. 2012-05-07T15:19:37Z. 2012-05-16T15:46:52Z. Maughan, Edwin K., 1926-1995. U.S. Geological Survey. English. Public. Kentucky, Letcher County, and Harlan County.
