Enger, Eldon D. Environmental science : a study of interrelationships. - 9th ed. / Eldon D. Enger, Bradley F. Smith. - Boston : McGraw-Hill Higher Education, c2004. - 1 v. (various pagings) : col. ill. ; 29 cm. Includes bibliographical references and index. ISBN: 0072919876 LCCN: 2002075341 Subjects--Topical Terms: Environmental sciences. LC Class. No.: GE105 / .E54 2004 Dewey Class. No.: 363.7