@misc{indiciaed93ca45aed8e,
  title = {Preliminary geologic map of the Winchester 7.5' quadrangle, Riverside County, California},
  author = {Douglas M. Morton},
  year = {2003},
  doi = {10.3133/ofr03188},
  url = {https://pubs.usgs.gov/publication/ofr03188},
  note = {Source identifier: ofr03188}
}