@misc{indiciaec294fd95930a,
  title = {Active-, inactive-, and abandoned-mine information and selected geochemical data for the State of California},
  author = {Jean L. Ryder},
  year = {1996},
  doi = {10.3133/ofr964},
  url = {https://pubs.usgs.gov/publication/ofr964},
  note = {Source identifier: ofr964}
}