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Journal Article Extinction, Substitution, and Ecosystem Services Get access Paul R. Ehrlich, Paul R. Ehrlich Search for other works by this author on: Oxford Academic Google Scholar Harold A. Mooney Harold A. Mooney Search for other works by this author on: Oxford Academic Google Scholar BioScience, Volume 33, Issue 4, April 1983, Pages 248–254, https://doi.org/10.2307/1309037 Published: 01 April 1983 Article history Accepted: 20 October 1982 Published: 01 April 1983
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Ehrlich et al. (1983) studied this question.
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