TY  - GEN
AU  - Johannsen,Albert
TI  - Descriptive petrography of the igneous rocks
PY  - 1938///
CY  - Illinois
KW  - Petrography
KW  - Igneous Rocks
N1  - Vol. IV; Part 1: The fedlspathoid rocks; Part 2 : The peridotites and perknites
ER  -