TY  - BOOK
AU  - Thornbury, William D.
TI  - Principles of geomorphology
SN  - 471861979
U1  - 551.4 23
PY  - 1968///, c1969]
CY  - New Age
PB  - New Delhi
KW  - Geomorphology
N1  - Includes bibliographies
ER  -