TY  - BOOK
AU  - Thornbury,William D.
TI  - Principles of geomorphology
SN  - 8123908113
U1  - 551.4 22
PY  - 1968///, c1969]
CY  - New York
PB  - Wiley
KW  - Geomorphology
N1  - Includes bibliographies
ER  -