TY  - RPRT
TI  - New ages for intrusive rocks in the Colorado mineral belt
AU  - Charles G. Cunningham
AU  - Charles W. Naeser
AU  - Richard F. Marvin
PY  - 1977
DO  - 10.3133/ofr77573
UR  - https://pubs.usgs.gov/publication/ofr77573
ID  - ofr77573
ER  -