@misc{indiciae1236fd8fd6ad,
  title = {Geology of the Empire Copper Mine near Mackay, Idaho},
  author = {F.W. Farwell and R.P. Full},
  year = {1944},
  doi = {10.3133/ofr4417},
  url = {https://pubs.usgs.gov/publication/ofr4417},
  note = {Source identifier: ofr4417}
}