@misc{indiciae241c4e92ac7b,
  title = {Map showing mineral resource evaluation of 53 proposed wilderness areas, California},
  author = {Luis A. Fraticelli and John Patrick Albers},
  year = {1981},
  doi = {10.3133/ofr811215},
  url = {https://pubs.usgs.gov/publication/ofr811215},
  note = {Source identifier: ofr811215}
}