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Subjects
- Michigan3
- Typhoid Fever -- etiology2
- United States2
- Climate1
- Cold Temperature1
- Communicable Diseases -- etiology1
- Epidemics1
- Legislation, Medical1
- Licensure1
- Meteorological Concepts1
- Physicians1
- Public Health -- trends1
- Respiratory Physiological Phenomena1
- Respiratory Tract Diseases1
- Tuberculosis -- etiology1
- Typhoid Fever -- pathology1
- Water Wells1
