Não informado. (1941). Medical Bulletin. Standard Oil Company and Affiliated Companies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Medical Bulletin. New York: Standard Oil Company and Affiliated Companies, 1941.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Medical Bulletin. Standard Oil Company and Affiliated Companies, 1941.
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