Search U.S. government technical reports digitized or harvested by TRAIL.
List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks
List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks
Protection against mercury vapor afforded by canister gas masks
The significance of the Bureau of Mines approval of gas masks
List of respiratory protective devices approved by the U.S. Bureau of Mines