@misc{indiciaebdcf7ad6b3ba,
  title = {Geologic map of the Indian Spring Quadrangle, San Bernardino County, California},
  author = {H. G. Wilshire},
  year = {1992},
  doi = {10.3133/ofr92181},
  url = {https://pubs.usgs.gov/publication/ofr92181},
  note = {Source identifier: ofr92181}
}