@misc{indiciae1c44876eaeea,
  title = {Aeromagnetic map of Nevada: Color coded intensities},
  author = {Isidore Zietz and F. P. Gilbert and J.R. Kirby},
  year = {1978},
  doi = {10.3133/gp922},
  url = {https://pubs.usgs.gov/publication/gp922},
  note = {Source identifier: gp922}
}