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Subjects
- Pennsylvania5
- State Government3
- Constitution and Bylaws2
- Public Health Administration2
- Abattoirs -- legislation & jurisprudence1
- Air Pollution -- legislation & jurisprudence1
- Blindness -- prevention & control1
- Meat1
- Ophthalmia Neonatorum -- drug therapy1
- Pennsylvania. State Board of Health and Vital Statistics1
- Public Health Practice1
- Sanitation1
- Silver Nitrate -- therapeutic use1
- Swine1
- Trichinellosis1
- Trichinellosis -- prevention & control1