@misc{indiciaea28401eb1d88,
  title = {Geologic map of the Sunnymead 7.5' quadrangle, Riverside County, California},
  author = {Douglas M. Morton and Jonathan C. Matti},
  year = {2001},
  doi = {10.3133/ofr01450},
  url = {https://pubs.usgs.gov/publication/ofr01450},
  note = {Source identifier: ofr01450}
}