TY - BOOK T1 - Why preserve natural variety? / DA - c1987. CY - Princeton, N.J. : AU - Norton, Bryan G. CN - QH75 .N67 1987 CN - QH75 PB - Princeton University Press, PP - Princeton, N.J. : PY - c1987. N1 - "Written under the auspices of the Center for Philosophy and Public Policy, University of Maryland"--Opp. t.p. ID - 125849 KW - Biodiversity conservation. SN - 0691077622 (alk. paper) : TI - Why preserve natural variety? / ER -