Não informado. (1953). Occupational health bulletin. Department of National Health and Welfare, Industrial Health Division.
Lua i Stíl Chicago (17ú heag.)Não informado. Occupational Health Bulletin. Ottawa: Department of National Health and Welfare, Industrial Health Division, 1953.
Lua MLA (8ú heag.)Não informado. Occupational Health Bulletin. Department of National Health and Welfare, Industrial Health Division, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.