@misc{indiciae9977cbdbaebb,
  title = {Aeromagnetic map of the Blackcap Mountain area, California},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/ofr791207},
  url = {https://pubs.usgs.gov/publication/ofr791207},
  note = {Source identifier: ofr791207}
}