COMPARISON OF DUST EXPOSURES IN PENNSYLVANIA ANTHRACITE AND BITUMINOUS COAL MINES.
D003031:Coal; D003032:Coal Mining; D004391:Dust; D004782:Environmental Health; D008906:Mining; D010414:Pennsylvania; D012106:Research; D012822:Silicon Dioxide; D013672:Technology
D003031:Coal; D004391:Dust; D012822:Silicon Dioxide
COAL; COAL MINING; DUST; ENVIRONMENTAL HEALTH; EXPERIMENTAL LAB STUDY; PENNSYLVANIA; SILICA; TECHNOLOGY