TY  - BOOK
AU  - Rolston,Holmes
TI  - Environmental ethics: duties to and values in the natural world 
SN  - 087722501X
PY  - 1988///
CY  - Philadelphia
PB  - Temple University Press
KW  - Human ecology--Moral and ethical aspects
N1  - Bibliography: p. 355-374. Includes index
ER  -