@misc{indiciae6515110b1ee5,
  title = {Geologic Map of the Sheep Hole Mountains 30' x 60' Quadrangle, San Bernardino and Riverside Counties, California},
  author = {Keith A. Howard},
  year = {2002},
  doi = {10.3133/mf2344},
  url = {https://pubs.usgs.gov/publication/mf2344},
  note = {Source identifier: mf2344}
}