@misc{indiciae2aa2343c3981,
  title = {Blue Ledge mine, Siskiyou County, California},
  author = {Garn Arthur Rynearson and R.M. Hutchinson},
  year = {1956},
  doi = {10.3133/ofr56105},
  url = {https://pubs.usgs.gov/publication/ofr56105},
  note = {Source identifier: ofr56105}
}