Armstrong,Susan J., Botzler,Richard.G Environmental ethics: divergence and convergence/ - Boston Mc graw hill 2003 - 609 ISBN: 0-07283845-0 LCCN: GF 80 .E585 2003 C.1 Subjects--Topical Terms: Environmental ethicsHuman ecology- History LC Class. No.: GF 80 / .E585 2003