@misc{indiciae9a5a7bac1d07,
  title = {Complete Bouguer gravity anomaly map of the Bearpaw Mountains and vicinity, Montana},
  author = {Donald L. Peterson and William L. Rambo},
  year = {1967},
  doi = {10.3133/ofr67177},
  url = {https://pubs.usgs.gov/publication/ofr67177},
  note = {Source identifier: ofr67177}
}