↑ Butcher, Russell D. (2008). America's National wildlife refuges: a complete guide (2ed.). Lanham: Taylor. ISBN978-1-58979-383-5.
↑ Shogren, Jason F.; Tschirhart, John, eds. (2001). Protecting endangered species in the United States: biological needs, political realities, economic choices. Cambridge: Cambridge University Press. ISBN978-0-521-66210-9.
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