Search U.S. government technical reports digitized or harvested by TRAIL.
Shaft sinking at the Sevier Valley Coal Co. mine
Timber withdrawing and devices used for this purpose in some coal mines
An international viewpoint on safeguarding electrical equipment used in gassy mines
Competitive conditions in the international coal trade
Shaft- and slope-bottom lay-outs at coal mines
Coal-mine explosives :their characteristics, selection and safe use
Some phases of haulage accident prevention in anthracite mines
Multiple-shift mechanical mining in some bituminous coal mines.