Não informado. (1941). Conservation bulletin of the Fish Wildlife Service, United States. U.S. Fish and Wildlife Service.
Chicago Style (17. basım) AtıfNão informado. Conservation Bulletin of the Fish Wildlife Service, United States. Washington: U.S. Fish and Wildlife Service, 1941.
MLA (8th ed.) AtıfNão informado. Conservation Bulletin of the Fish Wildlife Service, United States. U.S. Fish and Wildlife Service, 1941.
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