Perman, Roger. Natural resource and environmental economics / Roger Perman, Yue Ma, James McGilvray. - London ;;New York : Longman, 1996 - xxiii, 396 p. : ill., maps 25 cm. Includes bibliographical references (p. [378]-388) and indexes. ISBN: 582257271 Subjects--Topical Terms: Environmental economics.;Natural resources.;Sustainable development.--Management. Universal Decimal Class. No.: 333.7