@misc{indiciae63693ec7cdbe,
  title = {Geologic map of the Palen-McCoy Wilderness Study Area and vicinity, Riverside County, California},
  author = {Paul Stone and G.J. Pelka},
  year = {1989},
  doi = {10.3133/mf2092},
  url = {https://pubs.usgs.gov/publication/mf2092},
  note = {Source identifier: mf2092}
}