Judson, Sheldon. Physical geology / Sheldon Judson, Marvin E. Kauffman, L. Don Leet. - Englewood Cliffs, N.J. : Prentice-Hall, c1987. - ix, 484 p. : ill. (some col.) 29 cm. Includes bibliographies and index. ISBN: 0136696988 : Subjects--Topical Terms: Physical geology. Dewey Class. No.: 551 / JUD,1987