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Some factors affecting losses of coal in mining
Falls of roof and coal in bituminous coal-mines
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Published Year
1920-1929 (2)
Subject
Bituminous coal mines and mining (2) *
Anthracite coal mines and mining (1)
Bituminous coal (1)
Bituminous coal--Pennsylvania (1)
Coal mine accidents (1)
Coal mine accidents--Statistics (1)
Coal mines and mining (1)
Coal mines and mining--United States (1)
Mine accidents (1)
Author
Adams, William W. (1)
Rice, George S. (1)
