@misc{indiciaedde8bd15e6c9,
  title = {Principal facts for gravity stations in the Bearpaw Mountains and vicinity, Montana},
  author = {Donald L. Peterson and William L. Rambo},
  year = {1972},
  doi = {10.3133/70043137},
  url = {https://pubs.usgs.gov/publication/70043137},
  note = {Source identifier: 70043137}
}