@misc{indiciaea9dbc55c3f40,
  title = {Preliminary geologic map emphasizing bedrock formations in Alameda County, California: A digital database},
  author = {R. W. Graymer and D. L. Jones and E. E. Brabb},
  year = {1996},
  doi = {10.3133/ofr96252},
  url = {https://pubs.usgs.gov/publication/ofr96252},
  note = {Source identifier: ofr96252}
}