@misc{indiciae5dfc647b0cc2,
  title = {Geologic map of the Pioneer district, Powell County, Montana},
  author = {Jeffrey S. Loen and Michael R. Waters},
  year = {1988},
  doi = {10.3133/ofr87346},
  url = {https://pubs.usgs.gov/publication/ofr87346},
  note = {Source identifier: ofr87346}
}