@misc{indiciaeeeb156b3ce48,
  title = {Preliminary geologic map of San Mateo County, California},
  author = {E. E. Brabb and E. H. Pampeyan},
  year = {1972},
  doi = {10.3133/mf328},
  url = {https://pubs.usgs.gov/publication/mf328},
  note = {Source identifier: mf328}
}