@misc{indiciae93c7d1acbdef,
  title = {Generalized geologic map of the San Francisco Bay region, California},
  author = {Julius Schlocker},
  year = {1971},
  doi = {10.3133/ofr71246},
  url = {https://pubs.usgs.gov/publication/ofr71246},
  note = {Source identifier: ofr71246}
}