@misc{indiciae0ec6a8ab0074,
  title = {A review of the geology and petroleum resource potential of north central Montana},
  author = {T. S. Dyman},
  year = {1987},
  doi = {10.3133/ofr87450g},
  url = {https://pubs.usgs.gov/publication/ofr87450G},
  note = {Source identifier: ofr87450G}
}