Coal--a complex natural resource : an overview of factors affecting coal quality and use in the United States /
Schweinfurth, Stanley P.
Finkelman, Robert B.(Robert Barry)
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : U.S. Geological Survey, Information Services [distributor],
2003.
Shipping list no.: 2003-0281-P.
Includes bibliographical references (p. 34-37).
Coal