@misc{indiciae18a4cf3f58f0,
  title = {Areal geology of the Placerville Quadrangle, Colorado},
  author = {Alfred Lerner Bush and C. S. Bromfield and Charles Thomas Pierson},
  year = {1956},
  doi = {10.3133/tei547},
  url = {https://pubs.usgs.gov/publication/tei547},
  note = {Source identifier: tei547}
}