Thornbury, William D. 1900- Principios de geomorfologĂa. - New York, Wiley [1954] - 618 p. illus. 23 cm. LCCN: 54007553 Nat. Bib. No.: GB54-12024 Subjects--Topical Terms: Geology, Structural.Geomorfologia LC Class. No.: QE601 / .T5 Dewey Class. No.: 551.4 551.4