Coal

The American Institute of Mining, Metallurgical, and Petroleum Engineers
C. F. Hardy D. R. Mitchell
Organization:
The American Institute of Mining, Metallurgical, and Petroleum Engineers
Pages:
3
File Size:
419 KB
Publication Date:
Jan 2, 1951

Abstract

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Bolts held up roofs as mining machines went on to set new records, but rising labor costs still plagued operators.
Citation

APA: C. F. Hardy D. R. Mitchell  (1951)  Coal

MLA: C. F. Hardy D. R. Mitchell Coal . The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1951.

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