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Subjects
- Public health60
- Hookworm disease52
- Malaria40
- Public health administration35
- Sanitary engineering25
- Yellow fever14
- Schools of public health10
- Respiratory organs -- Diseases7
- Epidemiology5
- Nursing5
- Tuberculosis5
- Agriculture1
- Annual reports1
- Central America1
- Charitable uses, trusts, and foundations1
- Charities1
- Influenza1
- Medical research1
- Medical sciences1
- Philanthropy1