@misc{indiciae1701d7a72d21,
  title = {Mineral resources of the Sheep Mountain Wilderness study area and the Cucamonga Wilderness and additions, Los Angeles and San Bernardino counties, California},
  author = {James G. Evans and Leroy Pankraatz and James Ridenour and Steven W. Schmauch and Nicholas T. Zilka},
  year = {1977},
  doi = {10.3133/ofr77251},
  url = {https://pubs.usgs.gov/publication/ofr77251},
  note = {Source identifier: ofr77251}
}