@misc{indiciae5ea081b01573,
  title = {Geologic map of the Twentynine Palms quadrangle, San Bernardino and Riverside Counties, California},
  author = {T. W. Dibblee},
  year = {1968},
  doi = {10.3133/i561},
  url = {https://pubs.usgs.gov/publication/i561},
  note = {Source identifier: i561}
}