@misc{indiciaeafb3d603e069,
  title = {Preliminary aeromagnetic anomaly map of California},
  author = {Carter W. Roberts and Robert C. Jachens},
  year = {1999},
  doi = {10.3133/ofr99440},
  url = {https://pubs.usgs.gov/publication/ofr99440},
  note = {Source identifier: ofr99440}
}