TY  - BOOK
AU  - Johannsen,Albert
TI  - A descriptive petrography of the igneous rocks
U1  -  552.1 
PY  - 1931///-1938
CY  - Chicago
PB  - University of Chicago Press
KW  - Rocks, Igneous
KW  - Petrology
KW  - Rocks
KW  - Classification
N1  - Includes index
ER  -