@misc{indiciae6bdf33d14f15,
  title = {Geologic map of the Morongo Valley quadrangle, San Bernardino and Riverside Counties, California},
  author = {T. W. Dibblee},
  year = {1967},
  doi = {10.3133/i517},
  url = {https://pubs.usgs.gov/publication/i517},
  note = {Source identifier: i517}
}