@misc{indiciae1efd1d7ba9cb,
  title = {Reconnaissance geologic map of the Hyampom Quadrangle, Trinity County, California},
  author = {W. P. Irwin},
  year = {1985},
  doi = {10.3133/mf1809},
  url = {https://pubs.usgs.gov/publication/mf1809},
  note = {Source identifier: mf1809}
}