Search U.S. government technical reports digitized or harvested by TRAIL.
Review of Bureau of Mines coal program,1969
Coal mine dust standards of the United States and other countries
Methods and costs of coal refuse disposal and reclamation
Mechanical properties and cutting characteristics of coal
Injury experience in coal mining, 1970
Technique to improve fuel extraction for coal seams intersected by oil and gas wells
Results of research to develop guidelines for mining near surface and underground bodies of water