@misc{indiciae25baa4c97bac,
  title = {The Kevin-Sunburst oil field and other possibilities of oil and gas in the Sweetgrass arch, Montana},
  author = {A. J. Collier},
  year = {1930},
  doi = {10.3133/b812b},
  url = {https://pubs.usgs.gov/publication/b812B},
  note = {Source identifier: b812B}
}