Enger, Eldon D. Environmental science a study of interrelationships Eldon D. Enger, Bradley F. Smith. - 7th ed. - Boston McGraw-Hill 2000. - xxi, 434 p. ill., map. 28 cm. + 1 computer disc. Includes index. ISBN: 0072304952 64.13 LCCN: 9921073 Subjects--Topical Terms: Environmental sciences LC Class. No.: GE105 / E54 2000 Dewey Class. No.: 628 / E576e7