The hazards to health in the hydrogenation of coal. 4. The control program and the clinical effects.
D003031:Coal; D006262:Health; D006801:Humans; D006865:Hydrogenation; D009787:Occupational Medicine; D012878:Skin Neoplasms / Q000209:etiology*
D003031:Coal
INDUSTRIAL MEDICINE; SKIN NEOPLASMS/etiology