@misc{indiciae0d34f3eaeb77,
  title = {Aeromagnetic map of the Vulcan area, San Bernardino County, California},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1988},
  doi = {10.3133/ofr88506},
  url = {https://pubs.usgs.gov/publication/ofr88506},
  note = {Source identifier: ofr88506}
}