@misc{indiciae415f71bdb0ea,
  title = {Preliminary geologic map of the La Costa Valley quadrangle, Alameda County, California},
  author = {T. W. Dibblee},
  year = {1980},
  doi = {10.3133/ofr80533a},
  url = {https://pubs.usgs.gov/publication/ofr80533A},
  note = {Source identifier: ofr80533A}
}