Não informado. (1906). Public Health. Department of Health.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Public Health. Lansing, Mich: Department of Health, 1906.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Public Health. Department of Health, 1906.
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