@misc{indiciae1bccd3494a6e,
  title = {Geologic map of the Circle Quadrangle, McCone County, Montana},
  author = {Roger B. Colton and J. P. McGraw and S.L. Durst},
  year = {1994},
  doi = {10.3133/ofr88630},
  url = {https://pubs.usgs.gov/publication/ofr88630},
  note = {Source identifier: ofr88630}
}