P.R. Ehrlich

Environment and Development Challenges: The Imperative to Act
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.
The Endangered Species Act. Open Letter from Leaders of Scientific Professional Societies (to U.S. Senator Dirk Kempthorne)
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.