@misc{indiciae6a4873e15ced,
  title = {Geologic interpretation of aeromagnetic and aeroradioactivity maps of northern Georgia},
  author = {M. W. Higgins and Isidore Zietz},
  year = {1975},
  doi = {10.3133/i783},
  url = {https://pubs.usgs.gov/publication/i783},
  note = {Source identifier: i783}
}