@misc{indiciaefee1963d1123,
  title = {Residual gravity map of the Geysers area, California},
  author = {William Frank Isherwood},
  year = {1976},
  doi = {10.3133/ofr76356},
  url = {https://pubs.usgs.gov/publication/ofr76356},
  note = {Source identifier: ofr76356}
}