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Diphtheria -- mortality
✖Remove constraint Subjects: Diphtheria -- mortality
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Health map of Montreal: showing the annual death rate per thousand for the average of the years 1876, '77, and '78, resulting from smallpox, typhoid fever, and diphtheria
✖Remove constraint Titles: Health map of Montreal: showing the annual death rate per thousand for the average of the years 1876, '77, and '78, resulting from smallpox, typhoid fever, and diphtheria