@misc{indiciae93e315bb55c9,
  title = {Aeromagnetic map of parts of Crawford, Washington, and St. Francois Counties, Missouri, showing total intensity anomalies},
  author = {F. Keller and J. R. Henderson},
  year = {1947},
  doi = {10.3133/ofr4724},
  url = {https://pubs.usgs.gov/publication/ofr4724},
  note = {Source identifier: ofr4724}
}