TY  - BOOK
AU  - Tyrrell G W
TI  - Principles of petrology: An introduction to the science of rocks
SN  - 8172250177 (pbk)
U1  - H2, F6-;2 
PY  - 1926///
CY  - Ahmedabad
PB  - B I Publications Pvt Ltd     
KW  -  Petrology
KW  - Geology
N1  - Index 337-349p
ER  -