Environmental ethics :
Rolston, Holmes.
Environmental ethics : duties to and values in the natural world / Holmes Rolston. - Philadelphia : Temple University Press, 1988. - xiii, 391 p. : ill. ; 23 cm. - Ethics and action .
Bibliography: p. 355-374. Includes index.
087722501X
Human ecology--Moral and ethical aspects.
Environmental ethics : duties to and values in the natural world / Holmes Rolston. - Philadelphia : Temple University Press, 1988. - xiii, 391 p. : ill. ; 23 cm. - Ethics and action .
Bibliography: p. 355-374. Includes index.
087722501X
Human ecology--Moral and ethical aspects.