TY  - BOOK
AU  - THORNBURY,WILLION D.
TI  - PRINCIPLES OF GEOMORPHOLOGY / 
U1  - 551.41 
PY  - 1991///
CY  - [S.N] : 
PB  - WILEY EASTERN LIMITED ، 
KW  - GEOLOGY
KW  - GEOMOPHOLOGY
ER  -