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Subjects
- Environment, Controlled[remove]9
- Sanitation3
- New York City2
- Schools2
- City Planning1
- District of Columbia1
- District of Columbia. Health Department1
- Hospitals, Isolation1
- Housing1
- Hygiene1
- Inventions1
- Michigan1
- Military Hygiene1
- Naval Medicine1
- Poverty1
- Public Health1
- Sanitary Engineering -- legislation & jurisprudence1
- Sanitary Engineering -- methods1
- School Health Services1
- United States1
