“ENVIRONMENTAL SCIENCE.” A History of Environmental Politics Since 1945, by SAMUEL P. HAYS, University of Pittsburgh Press, Pittsburgh, Pa., 2000, pp. 137–153, www.jstor.org/stable/j.ctt6wrcjm.14. Accessed 15 July 2020.
HAYS, S. (2000). ENVIRONMENTAL SCIENCE. In A History of Environmental Politics Since 1945 (pp. 137-153). Pittsburgh, Pa.: University of Pittsburgh Press. Retrieved July 15, 2020, from www.jstor.org/stable/j.ctt6wrcjm.14
HAYS, SAMUEL P. "ENVIRONMENTAL SCIENCE." In A History of Environmental Politics Since 1945, 137-53. Pittsburgh, Pa.: University of Pittsburgh Press, 2000. Accessed July 15, 2020. www.jstor.org/stable/j.ctt6wrcjm.14.
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