Não informado. (1949). Industrial Medicine and Surgery. American Association of Industrial Physicians and Surgeons.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Medicine and Surgery. Miami, Fla: American Association of Industrial Physicians and Surgeons, 1949.
Lua MLA (8ú heag.)Não informado. Industrial Medicine and Surgery. American Association of Industrial Physicians and Surgeons, 1949.
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