@misc{indiciae017823e588f3,
  title = {Preliminary geologic map of the La Honda and San Gregorio quadrangles, San Mateo County, California},
  author = {Earl E. Brabb},
  year = {1980},
  doi = {10.3133/ofr80245},
  url = {https://pubs.usgs.gov/publication/ofr80245},
  note = {Source identifier: ofr80245}
}