title: Physical and chemical properties of respirable coal dust from two United States mines.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002627:Chemistry, Physical; D003031:Coal / Q000032:analysis*; D003032:Coal Mining; D004391:Dust / Q000032:analysis*; D006801:Humans; D008722:Methods; D010316:Particle Size; D010414:Pennsylvania; D012822:Silicon Dioxide / Q000032:analysis; D014131:Trace Elements / Q000032:analysis
chemical_list: D003031:Coal; D004391:Dust; D014131:Trace Elements; D012822:Silicon Dioxide