Não informado. (1921). American journal of tropical medicine. American Society of Tropical Medicine.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Tropical Medicine. Baltimore, Md: American Society of Tropical Medicine, 1921.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Tropical Medicine. American Society of Tropical Medicine, 1921.
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