Não informado. (1963). Occupational safety and health abstracts. International Occupational Safety and Health Information Centre.
Lua i Stíl Chicago (17ú heag.)Não informado. Occupational Safety and Health Abstracts. Geneva, Suíça: International Occupational Safety and Health Information Centre, 1963.
Lua MLA (8ú heag.)Não informado. Occupational Safety and Health Abstracts. International Occupational Safety and Health Information Centre, 1963.
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