@misc{indiciae3cac83be98ea,
  title = {Preliminary geologic map of the Simi 7.5' quadrangle, southern California: A digital database},
  author = {R.F. Yerkes and R. H. Campbell},
  year = {1997},
  doi = {10.3133/ofr97259},
  url = {https://pubs.usgs.gov/publication/ofr97259},
  note = {Source identifier: ofr97259}
}