@misc{indiciae9a8fc96e0eaa,
  title = {Preliminary geologic map of the Copper Mountain Quadrangle, Stanislaus County, California},
  author = {T. W. Dibblee},
  year = {1982},
  doi = {10.3133/ofr82393},
  url = {https://pubs.usgs.gov/publication/ofr82393},
  note = {Source identifier: ofr82393}
}