@misc{indiciae2377d9d95465,
  title = {Total intensity aeromagnetic map of Madison County, Indiana},
  author = {John R. Henderson and J. L. Meuschke},
  year = {1951},
  doi = {10.3133/gp67},
  url = {https://pubs.usgs.gov/publication/gp67},
  note = {Source identifier: gp67}
}