Não informado. (1949). Industrial Medicine and Surgery. American Association of Industrial Physicians and Surgeons.
Chicago-referens (17:e uppl.)Não informado. Industrial Medicine and Surgery. Miami, Fla: American Association of Industrial Physicians and Surgeons, 1949.
MLA-referens (8:e uppl.)Não informado. Industrial Medicine and Surgery. American Association of Industrial Physicians and Surgeons, 1949.
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