@misc{indiciae672915e8a57e,
  title = {Preliminary geologic map of the Newhall 7.5' quadrangle, southern California: a digital database},
  author = {R.F. Yerkes and Russell H. Campbell},
  year = {1995},
  doi = {10.3133/ofr95800},
  url = {https://pubs.usgs.gov/publication/ofr95800},
  note = {Source identifier: ofr95800}
}