Não informado. (1974). International Journal of Occupational Health and Safety. Medical Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. International Journal of Occupational Health and Safety. Northbrook, Ill: Medical Publications, 1974.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. International Journal of Occupational Health and Safety. Medical Publications, 1974.
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