@misc{indiciae2e4205b1cdd0,
  title = {Preliminary merged aeromagnetic map of Oregon},
  author = {C. W. Roberts and R.J. Blakely and C. A. Finn},
  year = {1997},
  doi = {10.3133/ofr97440},
  url = {https://pubs.usgs.gov/publication/ofr97440},
  note = {Source identifier: ofr97440}
}