TY  - BOOK
AU  - Thornbury,William D.
TI  - Principles of geomorphology
SN  - 0471861979
AV  - GB55 .T49 1969
U1  - 551.4 
PY  - 1968/// [Indian reprint 1998]
CY  - New York, New Delhi
PB  - Wiley, The New Age International
KW  - Geomorphology
N1  - Includes bibliographical references and index
ER  -