Não informado. (1920). Bulletin of the International Health Board. Rockefeller Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the International Health Board. New York: Rockefeller Foundation, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bulletin of the International Health Board. Rockefeller Foundation, 1920.
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