DesJardins, Joseph R. Environmental ethics : an introduction to environmental philosophy / Joseph R. DesJardins - 5th ed. - Boston, MA : Wadsworth Cengage Learning, 2013 - xvi, 282 p. ; 24 cm. Includes bibliographical references and index ISBN: 9781133049975 (pbk.) 1133049974 (pbk.) Subjects--Topical Terms: Environmental ethics