Coal Resources Available for Development - A Methodology and Pilot Study
By Jane R. Eggleston1, M.
Devereux Carter1, and James C. Cobb2
1U.S. Geological Survey, Reston, VA 20192, 2Kentucky Geological Survey, Lexington, KY.
|Figure 3. Resource classification system (modfied from Averitt, 1975).|
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