@misc{indiciae2ae4445983d7,
  title = {Complete Bouguer gravity anomaly map of the Santa Ana 1° by 2° quadrangle, California},
  author = {Shawn Biehler and V.E. Langenheim and R. F. Sikora and R. H. Chapman and L. A. Beyer},
  year = {1992},
  doi = {10.3133/ofr92279},
  url = {https://pubs.usgs.gov/publication/ofr92279},
  note = {Source identifier: ofr92279}
}