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Start Over Subjects Protective Factors ✖Remove constraint Subjects: Protective Factors Titles The comparative rarity of pulmonary tuberculosis in the highlands of Pennsylvania and the adjacent counties of New York ✖Remove constraint Titles: The comparative rarity of pulmonary tuberculosis in the highlands of Pennsylvania and the adjacent counties of New York Dates by Range 1850-1899 ✖Remove constraint Dates by Range: 1850-1899

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  • The comparative rarity of pulmonary tuberculosis in the highlands of Pennsylvania and the adjacent counties of New York1