Foster, Robert J. 1929 April 19- Physical geology / Robert J. Foster. - 4th ed. - Columbus : C.E. Merrill Pub. Co., c1983. - xiii, 432 p. : ill. (some col.) ; 29 cm. Includes bibliographies and index. ISBN: 0675200210 Subjects--Topical Terms: Physical geology. Dewey Class. No.: 551 / FOP 1983