@misc{indiciaeeaa02d53b853,
  title = {Magnetic field monitoring of tectonic stress in Southern California},
  author = {Floyd J. Williams},
  year = {1981},
  doi = {10.3133/ofr81383},
  url = {https://pubs.usgs.gov/publication/ofr81383},
  note = {Source identifier: ofr81383}
}