@misc{indiciae604df5f61f2b,
  title = {Aeromagnetic map of part of the Tri-State mining district, Kansas, Missouri, and Oklahoma},
  author = {Fred Keller and J. R. Henderson},
  year = {1963},
  doi = {10.3133/gp427},
  url = {https://pubs.usgs.gov/publication/gp427},
  note = {Source identifier: gp427}
}