|Biewick, Laura R.H., 1997, Coal fields
and Federal lands of the conterminous United States: U.S. Geological Survey
Open-File Report 97-461.
||Trent, V.A., 1986, Estimated resources
of non-leased Federal coal, Powder River Basin, Montana and Wyoming: U.S.
Geological Survey Miscellaneous Field Studies Map MF-1887.
|Hettinger, R.D., Roberts, L.N.R., Biewick, L.R.H.,
and Kirschbaum, M.A., 1996, Preliminary investigations of the distribution
and resources of coal in the Kaiparowits Plateau, southern Utah: U.S. Geological
Survey Open-File Report 96-539, 72 p.
||U.S. Department of Energy, Energy Information
Administration, 1995, “Annual Energy Review 1994”: DOE/EIA-1384(94),
|Keystone Coal Industry Manual, 1997,
Chicago, Ill., Intertec Publishing Company, 800 p.
||U.S. Department of Energy, Energy Information Administration,
1996, “Coal Industry Annual 1995”: DOE/EIA-0584(95), table 13.
|The Mining Record (newspaper), 1997, “Powder River
is the largest U.S. coal mining company”: Volume 108, Number 24, June 11,
||U.S. Department of the Interior, Minerals Management
Service, 1996, Royalty Management Program, “Federal Mineral Disbursements
by State and County—Fiscal Year 1996.”