TY  - BOOK
AU  - Norton,Bryan G.
TI  - Why preserve natural variety?
SN  - 0691077622
PY  - 1987///
CY  - Princeton, N.J.
PB  - Princeton University Press
KW  - Science
KW  - Biology
KW  - Biological diversity
N1  - Title on cover : Studies in moral, political, and legal philosophy; Includes index
ER  -