TY  - BOOK
AU  - TYRRELL, G.W.
TI  - PRINCIPLES OF PETROLOGY: AN INTRODUCTION TO THE SCIENCE OF ROCKS
SN  - 81-7225-017-7
U1  - 552 
PY  - 1998///
CY  - Madras
PB  - B.I. Publications, Madras 
ER  -