@misc{indiciae0954f31445d9,
  title = {Aeromagnetic maps of the west-central Sierra Nevada, California},
  author = {D. A. Ponce and V.E. Langenheim},
  year = {1987},
  doi = {10.3133/gp983},
  url = {https://pubs.usgs.gov/publication/gp983},
  note = {Source identifier: gp983}
}