@misc{indiciae1dd8665d7e32,
  title = {Natural gamma aeroradioactivity map of central Ohio and east-central Indiana},
  author = {R. G. Bates},
  year = {1965},
  doi = {10.3133/gp524},
  url = {https://pubs.usgs.gov/publication/gp524},
  note = {Source identifier: gp524}
}