Keller, Edward A., 1942- Environmental geology/ Edward A. Keller, with assistance from E.M. Burt. - 5th ed. - Columbus : Merrill Pub. Co., c1988. - xiii, 540 p., [6] p. of plates : ill. (some col.). maps (some col.) ; 29 cm. Includes bibliographies and index. ISBN: 0675208890 Subjects--Topical Terms: Environmental geology. LC Class. No.: QE33.K38 1988