Energy Resources Program
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East, J.A., 2013, Coal fields of the conterminous United States—National Coal Resource Assessment updated version: U.S. Geological Survey Open-File Report 2012–1205, one sheet, scale 1:5,000,000 available at
Warwick, P.D., Podwysocki, S.M., and Schultz, A.C., 2005, Preliminary Assessment of Coal Resources for the Chemard Lake (Naborton No. 2) Coal Zone of the Lower Wilcox Group (Paleocene), Northwestern Louisiana: U.S. Geological Survey Open-File Report 2005-1262, 28p.
Karlsen, A.W., SanFilipo, J.R., and Warwick, P.D., 2002, Coal underlying federal lands in the Gulf of Mexico Coastal Plain: U.S. Geological Survey Fact Sheet FS-094-02, 2 p.
Warwick, P.D., Aubourg, C.E., Suitt, S.E., Podwysocki, S.M., and Schultz, A.C., 2002, Preliminary evaluation of the coal resources for part of the Wilcox Group (Paleocene through Eocene), central Texas: U.S. Geological Survey Open-File Report 02-0359, 80 p.
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