Não informado. (1949). Special Scientific Report. U.S. Fish and Wildlife Service.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Special Scientific Report. Seattle, Wash: U.S. Fish and Wildlife Service, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Special Scientific Report. U.S. Fish and Wildlife Service, 1949.
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