@misc{indiciae7fdd2ab5d136,
  title = {Geologic map of the Sunnymead Quadrangle, Riverside County, California},
  author = {Douglas M. Morton},
  year = {1978},
  doi = {10.3133/ofr7822},
  url = {https://pubs.usgs.gov/publication/ofr7822},
  note = {Source identifier: ofr7822}
}