@misc{indiciae305309d17524,
  title = {Preliminary total intensity aeromagnetic maps of part of Grays Harbor, Pacific, Thurston, and Lewis Counties, Washington},
  author = {John R. Henderson},
  year = {1952},
  doi = {10.3133/ofr5274},
  url = {https://pubs.usgs.gov/publication/ofr5274},
  note = {Source identifier: ofr5274}
}