@misc{indiciaef73bd0497f70,
  title = {Merged aeromagnetic data for the southwestern United States},
  author = {V. J. S. Grauch},
  year = {1988},
  doi = {10.3133/ofr88603},
  url = {https://pubs.usgs.gov/publication/ofr88603},
  note = {Source identifier: ofr88603}
}