Search U.S. government technical reports digitized or harvested by TRAIL.
Control of sulfur and ash in mine-run metallurgical coal :report [No.] 1
A study of summer air conditioning with water sprays to prevent roof falls at the Beech Bottom Coal Mine, West Virginia
Use of scrapers and other light earth-moving equipment in bituminous-coal strip mining
Mechanical mining in some bituminous-coal mines.
Slope sinking through water-bearing strata at mine 3, Bell & Zoller Coal & Mining Co., Williamson County, Ill.