Enger, Eldon D. Environmental science : a study of interrelationship / Eldon D. Enger and Bradley F. Smith - 7th ed. - Boston, Mass : McGraw-Hill, c2000. - xxi, 434 p. : ill., maps. ; 28 cm. ISBN: 0072304952 LCCN: Subjects--Topical Terms: Environmental science LC Class. No.: GE105 / .E54 2000 Dewey Class. No.: 363.7 / E57e