Environmental geology / Edward A. Keller. Keller, Edward A., 1942- Environmental geology. QE38 .K45 1992 550 20 KEE Includes bibliographical references and index. New York : Macmillan ; Toronto : Maxwell Macmillan Canada ; New York : Maxwell Macmillan International, c1992. c1992. 1992 Text xv, 521 p. : eng