@misc{indiciaef3685c5d97fc,
  title = {Complete Bouguer gravity map of The Geysers area, California},
  author = {William Frank Isherwood},
  year = {1976},
  doi = {10.3133/ofr76357},
  url = {https://pubs.usgs.gov/publication/ofr76357},
  note = {Source identifier: ofr76357}
}