@misc{indiciaea9e65c098190,
  title = {Calcite deposits in Imperial and San Diego counties, California: Report on the calcite mines in northeast San Diego County, California},
  author = {Cordell Durrell},
  year = {1977},
  doi = {10.3133/ofr77685b},
  url = {https://pubs.usgs.gov/publication/ofr77685B},
  note = {Source identifier: ofr77685B}
}