@misc{indiciaea31ce73753f4,
  title = {Preliminary geologic map of the Fontana 7.5' quadrangle, Riverside and San Bernardino Counties, California},
  author = {Douglas M. Morton and Kelly R. Bovard},
  year = {2003},
  doi = {10.3133/ofr03418},
  url = {https://pubs.usgs.gov/publication/ofr03418},
  note = {Source identifier: ofr03418}
}