@misc{indiciae97296ef1c926,
  title = {Ten preliminary aeromagnetic maps covering Clark, Floyd, Hamilton, Hancock, Harrison, Jackson, Jefferson, Madison, Tipton, and Washington Counties, Indiana},
  author = {John R. Henderson},
  year = {1950},
  doi = {10.3133/ofr5037},
  url = {https://pubs.usgs.gov/publication/ofr5037},
  note = {Source identifier: ofr5037}
}