@misc{indiciae63d44e403856,
  title = {Geologic map of the Cucamonga Peak 7.5-minute quadrangle, San Bernardino County, California},
  author = {Douglas M. Morton and Jonathan C. Matti},
  year = {1991},
  doi = {10.3133/ofr90694},
  url = {https://pubs.usgs.gov/publication/ofr90694},
  note = {Source identifier: ofr90694}
}