@misc{indiciae3deec2c4deba,
  title = {Preliminary geologic map of Frazer quadrangle, Montana},
  author = {Fred S. Jensen},
  year = {1951},
  doi = {10.3133/ofr5137},
  url = {https://pubs.usgs.gov/publication/ofr5137},
  note = {Source identifier: ofr5137}
}