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Subjects
- Panama Canal Zone[remove]8
- Military Medicine -- methods3
- Preventive Medicine -- methods3
- United States3
- World War II3
- Anopheles1
- Communicable Disease Control -- history1
- Construction Industry -- history1
- History, 19th Century1
- History, 20th Century1
- Isthmian Canal Commission (U.S.)1
- Malaria1
- Mortality1
- Mosquito Control1
- Mosquito Vectors1
- Occupational Health -- history1
- Public Health Administration1
- Sanitation1
- Sanitation -- history1
- Sanitation -- standards1