Summerfield, Michael A. Global geomorphology : an introduction to the study of landforms / Michael A. Summerfield. - New York ; Harlow : Longman Science & Technical, 1991. repr .1994. - 537 p. : ill.; 27 cm. Includes bibliographical references and index ISBN: 0582301564 Subjects--Topical Terms: Geormophology. Dewey Class. No.: 91:551 SUM Q 551.41 SUM