Coal dust: sources of pneumoconiosis and lung cancer.
D003031:Coal; D004391:Dust; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology*; D011009:Pneumoconiosis / Q000209:etiology*; D012822:Silicon Dioxide
D003031:Coal; D004391:Dust; D012822:Silicon Dioxide