TY  - BOOK
AU  - Tyrrell,G.W.
TI  - The principles of petrology: an introduction to the science of rocks 
SN  - 8172250177
U1  - 552.001 
PY  - 1998/// Rep
CY  - New Delhi
PB  - BI Publication
KW  - Petrology
N1  - Bibliographical foot-notes
ER  -