@misc{indiciaeda9a14c206b2,
  title = {Compilation and interpretation of water-quality and discharge data for acidic mine waters at Iron Mountain, Shasta County, California, 1940-91},
  author = {Charles N. Alpers and D. Kirk Nordstrom and J.M. Burchard},
  year = {1992},
  doi = {10.3133/wri914160},
  url = {https://pubs.usgs.gov/publication/wri914160},
  note = {Source identifier: wri914160}
}