Search U.S. government technical reports digitized or harvested by TRAIL.
Training with mine-rescue breathing apparatus
Oxygen mine rescue apparatus and physiological effects on users
Progress of investigations on liquid-oxygen explosives
State laws relating to coal-mine timbering
Falls of roof in bituminous coal mines :influence of the seasons and rate of production
Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio
Falls of roof and coal in mines operating in the Sewickley coal bed in Monongalia County, W. Va.
A study of mine roof of the Pittsburgh coal bed in the Pittsburgh mining district
A study of roof in Pennsylvania mines contiguous to Monongahela River
Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia
A study of mine roof of the coking district of Western Pennsylvania