@misc{indiciae3eca635493c2,
  title = {Geologic maps of the north half of the Mullan and vicinity quadrangle, Idaho},
  author = {Allan B. Griggs},
  year = {1952},
  doi = {10.3133/ofr5254},
  url = {https://pubs.usgs.gov/publication/ofr5254},
  note = {Source identifier: ofr5254}
}