@misc{indiciaedf2bb6912f13,
  title = {Correlation of basal Permian and older rocks in southwestern Colorado, northwestern New Mexico, northeastern Arizona, and southeastern Utah},
  author = {N. W. Bass},
  year = {1944},
  doi = {10.3133/oc7},
  url = {https://pubs.usgs.gov/publication/oc7},
  note = {Source identifier: oc7}
}