TY  - BOOK
AU  - Thornbury,William D.
TI  - Principles of geomorphology
SN  - 0471861979
U1  - 551.4 21
PY  - 1968///, c1969], 2019
CY  - New York
PB  - Wiley
KW  - Geomorphology
N1  - Includes bibliographies
ER  -