@misc{indiciae80cd18e2598a,
  title = {Geology of the Cordelia and the northern part of the Benicia 7.5 minute quadrangles, California: A digital map database},
  author = {R. W. Graymer and E. E. Brabb and D. L. Jones},
  year = {1999},
  doi = {10.3133/ofr99162},
  url = {https://pubs.usgs.gov/publication/ofr99162},
  note = {Source identifier: ofr99162}
}