Não informado. (1974). International Journal of Occupational Health and Safety. Medical Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. International Journal of Occupational Health and Safety. Northbrook, Ill: Medical Publications, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. International Journal of Occupational Health and Safety. Medical Publications, 1974.
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