@misc{indiciae2cb7fec201ad,
  title = {Total intensity aeromagnetic map of Clay County, Indiana},
  author = {John R. Henderson and J. L. Meuschke},
  year = {1952},
  doi = {10.3133/gp103},
  url = {https://pubs.usgs.gov/publication/gp103},
  note = {Source identifier: gp103}
}