TY  - BOOK
AU  - Summerfield,M.A.
ED  - Longman Scientific & Technical
TI  - Global geomorphology: an introduction to the study of landforms 
SN  - 0582301564
U1  - 551.41 20th ed.
PY  - 1991///].
CY  - New York: 
PB  - Longman Scientific & Technical, 
KW  - Geomorphology
N1  - Includes bibliographical references and index (p. 525-537)
ER  -