@misc{indiciae635af4597d7e,
  title = {Possibility of finding oil in laccolithic domes south of the Little Rocky Mountains, Montana},
  author = {A. J. Collier and S. H. Cathcart},
  year = {1923},
  doi = {10.3133/b736f},
  url = {https://pubs.usgs.gov/publication/b736F},
  note = {Source identifier: b736F}
}