@misc{indiciae4ffb2ecbde76,
  title = {Geologic map and digital database of the Cougar Buttes 7.5' quadrangle, San Bernardino County, California},
  author = {Robert E. Powell and Jonathan C. Matti and P. M. Cossette},
  year = {2000},
  doi = {10.3133/ofr00175},
  url = {https://pubs.usgs.gov/publication/ofr00175},
  note = {Source identifier: ofr00175}
}