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P.R. Ehrlich

Brundtland, G. H., P.R. Ehrlich, J. Goldemberg, J. Hansen, A. Lovins, Gene E. Likens, S. Manabe, et al. 2012. “Environment and Development Challenges: The Imperative to Act”. Blue Planet Prize Joint Laureates UNEP Report. http://www.unep.org/pdf/pressreleases/Blue_Planet_synthesis_paper.pdf.
Ayala, F. J., R.K. Colwell, P.R. Ehrlich, Hardy Eshbaugh, Jerry F. Franklin, D. Freckman, D.H. Knight, et al. 1996. “The Endangered Species Act. Open Letter from Leaders of Scientific Professional Societies (to U.S. Senator Dirk Kempthorne)”. Bull. Ecol. Soc. Am.