@misc{indiciae610913dd8a0c,
  title = {Total intensity aeromagnetic map of Adams County, Indiana},
  author = {John R. Henderson and J. L. Meuschke},
  year = {1950},
  doi = {10.3133/gp20},
  url = {https://pubs.usgs.gov/publication/gp20},
  note = {Source identifier: gp20}
}