Search U.S. government technical reports digitized or harvested by TRAIL.
What the superintendent of a coal mine might do to prevent injury from falls of roof
Accident prevention in coal mining
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
The National safety competition of 1930
The National safety competition of 1931
The National safety competition of 1932
Working an underground mine 6 years without lost-time accidents
Falls of coal and rock on man-trips in bituminous-coal mines
The National safety competition of 1935