@misc{indiciae6f7ad856d068,
  title = {Oil and gas geology of the Birch Creek-Sun River area, northwestern Montana},
  author = {Eugene Stebinger},
  year = {1919},
  doi = {10.3133/b691e},
  url = {https://pubs.usgs.gov/publication/b691E},
  note = {Source identifier: b691E}
}