TY  - BOOK
AU  - Thornbury , William D.
TI  - Principles of  geomorphology
SN  - 0 85226 866 1
U1  - 551.4 
PY  - 1984///
CY  - Delhi
PB  - Wiley Eastern 
KW  - Geomorphology -
KW  - Geology - Geomorphology and hydrosphere -
N1  - Includes bibliographical references and index
ER  -