TY  - BOOK
AU  - Tyrrell,G.W.
TI  - The principles of petrology: an introduction to the science of rocks 
SN  - 0412215004
PY  - 1978///
CY  - London
PB  - Chapman & Hall
KW  - Petrology
KW  - Rocks
N1  - Bibliographical footnotes
ER  -