TY  - RPRT
TI  - Potassium-argon ages bearing on the igneous and tectonic history of the Elk Mountains and vicinity, Colorado: A preliminary report
AU  - John D. Obradovich
AU  - Felix E. Mutschler
AU  - Bruce Bryant
PY  - 1969
DO  - 10.1130/0016-7606(1969)80[1749:paboti]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70223876
ID  - 70223876
ER  -