@misc{indiciaeb2d31b48e346,
  title = {Preliminary geologic map of the Val Verde 7.5' quadrangle, southern California},
  author = {R.F. Yerkes and R. H. Campbell},
  year = {1995},
  doi = {10.3133/ofr95504},
  url = {https://pubs.usgs.gov/publication/ofr95504},
  note = {Source identifier: ofr95504}
}