@misc{indiciae0d476234895c,
  title = {Geologic map of the San Gorgonio Mountain quadrangle, San Bernardino and Riverside Counties, California},
  author = {T. W. Dibblee},
  year = {1964},
  doi = {10.3133/i431},
  url = {https://pubs.usgs.gov/publication/i431},
  note = {Source identifier: i431}
}