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Patten, Bernard C. “Environs: The Superniches of Ecosystems.” American Zoologist, vol. 21, no. 4, 1981, pp. 845–852., Accessed 8 Aug. 2020.
Patten, B. (1981). Environs: The Superniches of Ecosystems. American Zoologist, 21(4), 845-852. Retrieved August 8, 2020, from
Patten, Bernard C. "Environs: The Superniches of Ecosystems." American Zoologist 21, no. 4 (1981): 845-52. Accessed August 8, 2020.

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