@misc{indiciaef22810105a47,
  title = {Columnar sections of Mesozoic and Paleozoic rocks in the mountains of south-central Montana},
  author = {L.S. Gardner and T. A. Hendricks and H.D. Hadley and C.P. Rogers},
  year = {1945},
  doi = {10.3133/oc18},
  url = {https://pubs.usgs.gov/publication/oc18},
  note = {Source identifier: oc18}
}