@misc{indiciae32d28e40e474,
  title = {Aeromagnetic map of east-central United States},
  author = {T.G. Hildenbrand and R.P. Kucks and R. W. Johnson},
  year = {1981},
  doi = {10.3133/gp948},
  url = {https://pubs.usgs.gov/publication/gp948},
  note = {Source identifier: gp948}
}