@misc{indiciae3771a7916dcc,
  title = {Geologic map of the Redlands quadrangle, San Bernardino and Riverside Counties, California},
  author = {Douglas M. Morton},
  year = {1978},
  doi = {10.3133/ofr7821},
  url = {https://pubs.usgs.gov/publication/ofr7821},
  note = {Source identifier: ofr7821}
}