@misc{indiciae5569ff1b06fe,
  title = {Principal facts for gravity stations in the Bearpaw Mountains and vicinity, Montana},
  author = {Donald L. Peterson and William L. Rambo},
  year = {1967},
  doi = {10.3133/ofr67178},
  url = {https://pubs.usgs.gov/publication/ofr67178},
  note = {Source identifier: ofr67178}
}