TY  - BOOK
AU  - Harker,Alfred
TI  - Petrology for students: an introduction to the study of rocks under the microscope
AV  - QE431 .H28 1954
U1  - 552 
PY  - 1954///
CY  - Cambridge
PB  - University Press
KW  - Petrology
KW  - Volcanic rocks
KW  - Metamorphism
ER  -