@misc{indiciae1be6ca5c654d,
  title = {Geologic map of the Monument Peak Quadrangle, San Diego County, California},
  author = {Victoria R. Todd},
  year = {1978},
  doi = {10.3133/ofr78697},
  url = {https://pubs.usgs.gov/publication/ofr78697},
  note = {Source identifier: ofr78697}
}