@misc{indiciae35cc42854d86,
  title = {Petroleum potential of wilderness lands, Montana},
  author = {W. J. Perry and D. D. Rice and E. K. Maughan},
  year = {1982},
  doi = {10.3133/i1541},
  url = {https://pubs.usgs.gov/publication/i1541},
  note = {Source identifier: i1541}
}