@misc{indiciae09234508d964,
  title = {Preliminary geologic map of the northwestern part of the Butte 1? by 2? quadrangle, Montana},
  author = {C. A. Wallace and M. R. Klepper and A. B. French and D.M. Scarborough},
  year = {1978},
  doi = {10.3133/ofr78371},
  url = {https://pubs.usgs.gov/publication/ofr78371},
  note = {Source identifier: ofr78371}
}