Search U.S. government technical reports digitized or harvested by TRAIL.
Magnetic concentration of flue dust of the Birmingham district
Methods of rock-dusting American coal mines
Recommendations on the prevention and suppression of dust in mining, tunneling, and quarrying :adopted at a meeting held under the auspices of the International Labor Office, Geneva, Switzerland, December 1-17, 1952 :
Experiments on water infusion in the experimental coal mine