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USA | |
| Olive,Wilds W.,and Flinch,Warren L.,(1969) Stratigraphic and Mineralogic Relations and Ceramic Properties of Clay Deposits of Eocene Age in the Jackson Purchase Region,Kentucky and in Adjacent Parts of Tennessee :USGS Bulletion 1282 |
| Olive,Wilds W.,and Flinch,Warren L.,(1969) Stratigraphic and Mineralogic Relations and Ceramic Properties of Clay Deposits of Eocene Age in the Jackson Purchase Region,Kentucky and in Adjacent Parts of Tennessee :USGS Bulletion 1282 |
| Hower, J. C., O'Keefe, J. M., Henke, K. R., Wagner, N. J., Copley, G., Blake, D. R., ... & Silva, L. F. (2013). Gaseous emissions and sublimates from the Truman Shepherd coal fire, Floyd County, Kentucky: a re-investigation following attempted mitigation of the fire. International Journal of Coal Geology, 116, 63-74. |
| Olive,Wilds W.,and Flinch,Warren L.,(1969) Stratigraphic and Mineralogic Relations and Ceramic Properties of Clay Deposits of Eocene Age in the Jackson Purchase Region,Kentucky and in Adjacent Parts of Tennessee :USGS Bulletion 1282 |
| Olive,Wilds W.,and Flinch,Warren L.,(1969) Stratigraphic and Mineralogic Relations and Ceramic Properties of Clay Deposits of Eocene Age in the Jackson Purchase Region,Kentucky and in Adjacent Parts of Tennessee :USGS Bulletion 1282 |
| Hower, James C., Cortland F. Eble, Jennifer M. K. O'Keefe, Shifeng Dai, Peipei Wang, Panpan Xie, Jingjing Liu, Colin R. Ward, and David French. (2015) "Petrology, Palynology, and Geochemistry of Gray Hawk Coal (Early Pennsylvanian, Langsettian) in Eastern Kentucky, USA" Minerals 5, no. 3: 592-622. https://doi.org/10.3390/min5030511 |
| Olive,Wilds W.,and Flinch,Warren L.,(1969) Stratigraphic and Mineralogic Relations and Ceramic Properties of Clay Deposits of Eocene Age in the Jackson Purchase Region,Kentucky and in Adjacent Parts of Tennessee :USGS Bulletion 1282 |
| www.rkci.org (2008) http://www.rkci.org/library/gsp/engle.htm |