TY - BOOK AU - Thorn,Colin E. TI - An introduction to theoretical geomorphology SN - 0045511179 (alk. paper) AV - GB401.5 .T47 1988 U1 - 551.4 19 PY - 1988/// CY - Boston PB - Unwin Hyman KW - Geomorphology N1 - Includes indexes; Bibliography: p. [224]-237 ER -