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Subjects
- District of Columbia8
- Communicable Disease Control -- legislation & jurisprudence4
- Disinfection -- methods4
- Diphtheria -- prevention & control3
- Sanitary Engineering -- legislation & jurisprudence3
- Scarlet Fever -- prevention & control3
- Public Health -- legislation & jurisprudence2
- Sanitation -- legislation & jurisprudence2
- Ventilation2
- Communicable Disease Control1
- District of Columbia. Health Department.1
- Environment, Controlled1
- Smallpox -- prevention & control1