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Subjects
- Soil[remove]12
- Refuse Disposal -- methods2
- Toilet Facilities2
- Tuberculosis, Pulmonary -- etiology2
- Agriculture1
- Aluminum Silicates1
- Brazil1
- District of Columbia1
- Environment1
- Fungi1
- Geologic Sediments1
- Hydrocarbons1
- Hygiene1
- Malaria -- etiology1
- New England1
- Nutritional Physiological Phenomena1
- Oligochaeta1
- Particulate Matter1
- Sanitation1
- Tuberculosis, Pulmonary -- epidemiology1