@misc{indiciae02a7af4e5c9d,
  title = {Aeromagnetic map for part of southwestern Washington},
  author = {State of Washington},
  year = {1975},
  doi = {10.3133/ofr75648},
  url = {https://pubs.usgs.gov/publication/ofr75648},
  note = {Source identifier: ofr75648}
}