Search U.S. government technical reports digitized or harvested by TRAIL.
Injury experience in coal mining, 1968
Methane emission in coal mines :effects of oil and gas wells
Injury experience in coal mining, 1970
Injury experience in coal mining, 1969
Methane control in United States coal mines, 1972
Humidity :a cyclic effect in coal mine roof stability
Bureau of Mines research into reducing materials handling injuries