@misc{indiciae4bec0eb5cda5,
  title = {Preliminary geologic map of the Oat Mountain 7.5' Quadrangle, southern California},
  author = {R. F. Yerkes and R. H. Campbell},
  year = {1993},
  doi = {10.3133/ofr93525},
  url = {https://pubs.usgs.gov/publication/ofr93525},
  note = {Source identifier: ofr93525}
}