Search U.S. government technical reports digitized or harvested by TRAIL.
Mining Methods and Practice in the Michigan Copper Mines
Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan
Bibliography of Petroleum and Allied Substances, 1922 and 1923
Inspection and Testing of Mine-Type Electrical Equipment for Permissibility
Tests of Strength of Roof Supports Used in Anthracite Mines of Pennsylvania
Hazards from low or under voltage
Distillation-amalgamation methods for the technical determination of mercury in ores
Survey of fuel-oil distribution :central United States : 1928
Method and cost of mining the Pittsburgh, or no. 8, coal bed in four eastern Ohio mines
Methods of some progressive mining companies in placing responsibility for mine accidents
Present-day knowledge of the chemical constitution of coal
State regulations governing the use of trolley wires in mines
Method and Cost of Mining the Thick Freeport Coal in a Second Western Pennsylvania Mine
Permissible Storage - Battery Locomotives and Power Trucks
Summarized Data of Gold Production
Factors Governing the Entry of Solutions into Ores During Leaching