@misc{indiciae615afcc70eb7,
  title = {Preliminary geologic map of the Van Nuys 7.5' quadrangle, southern California: A digital database},
  author = {R.F. Yerkes},
  year = {1997},
  doi = {10.3133/ofr97165},
  url = {https://pubs.usgs.gov/publication/ofr97165},
  note = {Source identifier: ofr97165}
}