@misc{indiciaef1967e2a4b81,
  title = {Geologic map of San Mateo County, California},
  author = {E. E. Brabb and E. H. Pampeyan},
  year = {1983},
  doi = {10.3133/i1257a},
  url = {https://pubs.usgs.gov/publication/i1257A},
  note = {Source identifier: i1257A}
}