TY  - BOOK
AU  - Tyrrell,G.W.
TI  - The principles of petrology: an introduction to the science of rocks,
SN  - 0412215004
AV  - QE431 .T8 1929
U1  - 552 
PY  - 1929///]
CY  - New York
PB  - E.P. Dutton and Company, Inc.
KW  - Petrology
N1  - "Printed in Great Britain."; Bibliographical foot-notes
ER  -