Physical geography / Allan Strahler and Arthur Strahler. Strahler, Alan. 1918- Strahler, Arthur Physical geography. GB56 .S75 1975 910.02 STP Includes bibliographical references (p. 1-39) (3d group) and index. New York : Wiley, c2002. c2002. 1975 Text ix, 748 p. : eng