@misc{indiciaef3dde646cf25,
  title = {Geologic map of the Livermore gravels, Alameda County, California},
  author = {Vincent E. Barlock},
  year = {1988},
  doi = {10.3133/ofr88516},
  url = {https://pubs.usgs.gov/publication/ofr88516},
  note = {Source identifier: ofr88516}
}