TY  - BOOK
AU  - Johnson,Ross B.
TI  - Geology of the igneous rocks of the Spanish Peaks region, Colorado,
U1  - 550.8 
PY  - 1968///
CY  - Washington
PB  - United States Government Printing Office
KW  - Rocks, Igneous
KW  - Petrology
KW  - Colorado
KW  - Spanish Peaks region
KW  - Geology
N1  - Bibliography: p. 37-38
ER  -