@misc{indiciaec2ed915d51da,
  title = {Precambrian basement geologic map of Montana– An interpretation of aeromagnetic anomalies},
  author = {P.K. Sims and J.M. O’Neill and Viki Bankey and E. Anderson},
  year = {2004},
  doi = {10.3133/sim2829},
  url = {https://pubs.usgs.gov/publication/sim2829},
  note = {Source identifier: sim2829}
}