Keller, Edward A., 1942- Environmental geology / Edward A. Keller with assistance from E.M . Burt. - 4th ed. - Columbus : C.E. Merrill Pub. Co., c1985. - xii, 480 p., 24 p. of plates : ill. (some col.) ; 29 cm. Includes bibliographies and index. ISBN: 0675203732 LCCN: 84-062584 Subjects--Topical Terms: Environmental geology. Dewey Class. No.: 304.2 KEL