@misc{indiciae64144dfd2857,
  title = {Geology and oil and gas prospects of the Lake Basin field, Montana},
  author = {E.T. Hancock},
  year = {1919},
  doi = {10.3133/b691d},
  url = {https://pubs.usgs.gov/publication/b691D},
  note = {Source identifier: b691D}
}