Não informado. (1944). Industrial health bulletin. Department of National Health and Welfare, Industrial Health Division.
Lua i Stíl Chicago (17ú heag.)Não informado. Industrial Health Bulletin. Ottawa: Department of National Health and Welfare, Industrial Health Division, 1944.
Lua MLA (8ú heag.)Não informado. Industrial Health Bulletin. Department of National Health and Welfare, Industrial Health Division, 1944.
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