TY  - BOOK
AU  - Tyrrell,G.W.
TI  - The principles of petrology: an introduction to the science of rocks 
U1  - 552 
PY  - 1960///
CY  - Bombay
PB  - Asia Publ
KW  - Petrology
KW  - Rocks, Science
KW  - Rocks, Metamorphic
N1  - Printed in Great Britain; Includes index; Bibliographical foot-notes
ER  -