@misc{indiciaebad568f41946,
  title = {Aeromagnetic map of part of Tri-State mining district, showing total intensity anomalies},
  author = {F. Keller and J. R. Henderson},
  year = {1947},
  doi = {10.3133/ofr4725},
  url = {https://pubs.usgs.gov/publication/ofr4725},
  note = {Source identifier: ofr4725}
}