@misc{indiciaec7fc902f4b1d,
  title = {Aeromagnetic map of Idaho: Color coded intensities},
  author = {Isidore Zietz and F. P. Gilbert and J. R. Kirby},
  year = {1978},
  doi = {10.3133/gp920},
  url = {https://pubs.usgs.gov/publication/gp920},
  note = {Source identifier: gp920}
}