Estimate of known recoverable reserves of coking coal in Indiana County, Pa. /
by James J. Dowd [and others]

APA Citation

Dowd, J. J., United States. Bureau of Mines. (1950). Estimate of known recoverable reserves of coking coal in Indiana County, Pa.. Washington, D.C.: U.S. Department of the Interior, Bureau of Mines.

MLA Citation

Dowd, James J, and United States. Bureau of Mines. Estimate of Known Recoverable Reserves of Coking Coal In Indiana County, Pa.. Washington, D.C.: U.S. Department of the Interior, Bureau of Mines, 1950.