Weyman, Darrell R. (Darrell Richard). Lanscape processes : an introduction to geomorphololgy / Darrell and Valerie Weyman. - London etc. : Allen and Unwin, 1977. - 3-95 p. : ill. (chiefly col), maps (chiefly col) ; 25 cm. - Processes in physical geography 1. . Includes index and bibliography : p. 91. ISBN: 0045510261 Subjects--Topical Terms: Landforms.