@misc{indiciae864a89e75512,
  title = {Preliminary aeromagnetic maps of Nevada City and Alleghany 15-minute quadrangles, California},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/ofr76274},
  url = {https://pubs.usgs.gov/publication/ofr76274},
  note = {Source identifier: ofr76274}
}