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Start Over You searched for: Collections World War 2, 1939-1949 Remove constraint Collections: World War 2, 1939-1949 Subjects World War II Remove constraint Subjects: World War II Languages English Remove constraint Languages: English Copyright Public domain Remove constraint Copyright: Public domain Dates by Range 1900-1949 Remove constraint Dates by Range: 1900-1949

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7. Industrial hygiene manual supplement: pictures of processes, processes, toxic agents, suggested control measures, health hazards

9. Industrial hygiene manual: industrial toxic agents, chemical formula and synonyms, principal properties, principal industrial uses, poisoning-systemic, maximum permissible concentrations of atmopheric contaminants