@misc{indiciae87c420945ebc,
  title = {Geologic map and digital database of the Romoland 7.5' quadrangle, Riverside County, California},
  author = {Douglas M. Morton and Kelly R. Bovard and Gregory Morton},
  year = {2003},
  doi = {10.3133/ofr03102},
  url = {https://pubs.usgs.gov/publication/ofr03102},
  note = {Source identifier: ofr03102}
}