@misc{indiciae6da7d9f46bd0,
  title = {Geologic map of the Alpine Quadrangle, San Diego County, California},
  author = {Victoria R. Todd},
  year = {1980},
  doi = {10.3133/ofr8082},
  url = {https://pubs.usgs.gov/publication/ofr8082},
  note = {Source identifier: ofr8082}
}