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MLA
HELGEN, JUDY. Peril in the Ponds: Deformed Frogs, Politics, and a Biologist's Quest. University of Massachusetts Press, 2012, www.jstor.org/stable/j.ctt5vk62t, Accessed 15 Apr. 2021.
APA
HELGEN, J. (2012). Peril in the Ponds: Deformed Frogs, Politics, and a Biologist's Quest. Amherst; Boston: University of Massachusetts Press. Retrieved April 15, 2021, from http://www.jstor.org/stable/j.ctt5vk62t
CHICAGO
HELGEN, JUDY. Peril in the Ponds: Deformed Frogs, Politics, and a Biologist's Quest. Amherst; Boston: University of Massachusetts Press, 2012. Accessed April 15, 2021. http://www.jstor.org/stable/j.ctt5vk62t.

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