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― 1986b. The Preservation of Species: The Value of Biological Diversity, ed. Bryan G.Norton. Princeton, N.J.: Princeton University Press.
― 1987. Why Preserve Natural Variety! Princeton, N.J.: Princeton University Press.
― 1988. "Commodity, Amenity, and Morality: The Limits of Quantification in Valuing Biodiversity." In Wilson 1988a.
― 1990. "Ethical Imperatives for Biodiversity." Conference, "Biodiversity and Landscapes: Human Challenges for Conservation in the Changing World," Penn State University, 23Oct.
― 1991. Toward Unity among Environmentalists. New York: Oxford University Press.
― 1997: "Convergence and Contextualism: Some Clarifications and a Reply to Stevenson" , in: Environmental Ethics,19.
― 2005:Sustainability. A Philosophy of Adaptive Ecosystem Management ,The Univ. of Chicago Pr.
― 1986b. The Preservation of Species: The Value of Biological Diversity, ed. Bryan G.Norton. Princeton, N.J.: Princeton University Press.
― 1987. Why Preserve Natural Variety! Princeton, N.J.: Princeton University Press.
― 1988. "Commodity, Amenity, and Morality: The Limits of Quantification in Valuing Biodiversity." In Wilson 1988a.
― 1990. "Ethical Imperatives for Biodiversity." Conference, "Biodiversity and Landscapes: Human Challenges for Conservation in the Changing World," Penn State University, 23Oct.
― 1991. Toward Unity among Environmentalists. New York: Oxford University Press.
― 1997: "Convergence and Contextualism: Some Clarifications and a Reply to Stevenson" , in: Environmental Ethics,19.
― 2005:Sustainability. A Philosophy of Adaptive Ecosystem Management ,The Univ. of Chicago Pr.
