1. Harlan Yale Public content 1919. 2011-12-12T21:26:55Z. 2022-03-29T20:39:24Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kentucky.
2. Hyden Yale Public content 1919. 2011-12-12T21:26:56Z. 2022-03-29T20:39:24Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kentucky.
3. Map of the structural geology of Knott County, Ky. Yale Public content 1919. 2018-05-09T18:09:37Z. 2018-09-05T19:42:09Z. Browning, I. B., cartographer. Department of Geology and Forestry of Kentucky,Williams-Webb Co. English. cartographic image. Public. Kentucky, Knott County, Knott County (Ky.), and Knott County.
4. Nolansburg Yale Public content 1919. 2011-12-12T21:27:00Z. 2022-03-29T20:39:25Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Kentucky.