TY  - RPRT
TI  - Correlation of basal Permian and older rocks in southwestern Colorado, northwestern New Mexico, northeastern Arizona, and southeastern Utah
AU  - N. W. Bass
PY  - 1944
DO  - 10.3133/oc7
UR  - https://pubs.usgs.gov/publication/oc7
ID  - oc7
ER  -