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Search U.S. government technical reports digitized or harvested by TRAIL.
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6 results returnedFalls of roof in bituminous coal mines :influence of the seasons and rate of production
What the superintendent of a coal mine might do to prevent injury from falls of roof
What the mine foreman can do to prevent injury from falls of roof in coal mines
Reducing accidents from falls of roof in coal mines
What the coal miners can do to prevent injury from falls of roof
How to prevent death and injury from falls of roof in coal mines
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