@misc{indiciae57fe024786d6,
  title = {Correlation and subdivision of subsurface Lower Ordovician and Upper Cambrian rocks in northeastern Oklahoma},
  author = {Hubert Andrew Ireland},
  year = {1944},
  doi = {10.3133/oc5},
  url = {https://pubs.usgs.gov/publication/oc5},
  note = {Source identifier: oc5}
}