TY  - BOOK
AU  - Ballabh,, Parikshit
TI  - Introduction to geology / 
U1  - 551 
PY  - 2009///
CY  - New Delhi
PB  - Cyber Tech
KW  - Earth sciences
KW  - Geology
KW  - Geologic chronology
KW  - Mineral resources
ER  -