@misc{indiciaef2bd9916cfe4,
  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 and W. Beer and J.W. Nordquist},
  year = {1946},
  doi = {10.3133/ofr4634},
  url = {https://pubs.usgs.gov/publication/ofr4634},
  note = {Source identifier: ofr4634}
}