Recent progress in control of coal workers' pneumoconiosis.
D003032:Coal Mining / Q000592:standards; D004391:Dust / Q000517:prevention & control; D006801:Humans; D007883:Legislation, Medical; D010100:Oxygen; D011009:Pneumoconiosis / Q000517:prevention & control*; D014481:United States; D012122:Ventilators, Mechanical
D004391:Dust; D010100:Oxygen