Environmental science : sustaining the earth / G. Tyler Miller, Jr. Miller, G. Tyler (George Tyler), 1931- Environmental sciences. Human ecology. Environmental protection. GE105 .M543 1991 333.7 20 MIE Includes bibliographical references and index. Belmont, Calif. : Wadsworth Pub. Co., c1991. c1991. 1991 Text 1 v. (various pagings) : eng Wadsworth biology series