@misc{indiciae3c94158dc7f3,
  title = {Geologic map of the Challis Quadrangle, Custer County, Idaho},
  author = {D. H. McIntyre and S. W. Hobbs},
  year = {1978},
  doi = {10.3133/ofr781059},
  url = {https://pubs.usgs.gov/publication/ofr781059},
  note = {Source identifier: ofr781059}
}