TY  - GEN
AU  - Thornbury, William D
TI  - Principles of geomorphology
SN  - 0852268858
U1  - 551.41 
PY  - 1969///
CY  - New Delhi
PB  - New Age International
KW  - GEOLOGY
KW  - GEOMORPHOLOGY
KW  - MINERALOGY
KW  - PETROLOGY
ER  -