@misc{indiciaeae6071a2f371,
  title = {Hydrogeology and geochemistry of acid mine drainage in ground water in the vicinity of Penn Mine and Camanche Reservoir, Calaveras County, California: Second-year summary, 1992-93},
  author = {Scott N. Hamlin and Charles N. Alpers},
  year = {1996},
  doi = {10.3133/wri964257},
  url = {https://pubs.usgs.gov/publication/wri964257},
  note = {Source identifier: wri964257}
}