@misc{indiciae1fa74cf30045,
  title = {Aeromagnetic map of the Borrego Valley 1:100,000 scale quadrangle, California},
  author = {Robert C. Jachens},
  year = {1993},
  doi = {10.3133/ofr93283},
  url = {https://pubs.usgs.gov/publication/ofr93283},
  note = {Source identifier: ofr93283}
}