USGS · coal18
Coal beds of the Troublesome quadrangle, Breathitt, Knott, and Perry Counties, Kentucky
Abstract
The coal beds of the Troublesome quadrangle, Kentucky, have been studied as part of a general investigation of the coal resources of eastern Kentucky by the U.S. Geological Survey. The area covered by two maps already published is shown on the index map (fig. 7).
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Allen D. Williamson, W.L. Adkison. 1953. Coal beds of the Troublesome quadrangle, Breathitt, Knott, and Perry Counties, Kentucky. https://doi.org/10.3133/coal18
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