Search U.S. government technical reports digitized or harvested by TRAIL.
The use of dust respirators in coal mines
List of respiratory protective devices approved by the Bureau of Mines
Bureau of Mines approval system for respiratory protective devices
List of respiratory protective devices approved by the Bureau of Mines
Bureau of Mines approval system for respiratory protective devices :(revision of I.C. 7600)
Loss of life among wearers of oxygen breathing apparatus (Revision of I.C. 7279)