@misc{indiciae9abee0bc15de,
  title = {Preliminary structure contour map of the Cut Bank-West Kevin-Border districts, Glacier, Toole, and Pondera Counties, Montana},
  author = {C. E. Erdmann and N.A. Davis},
  year = {1939},
  doi = {10.3133/ofr392},
  url = {https://pubs.usgs.gov/publication/ofr392},
  note = {Source identifier: ofr392}
}