@misc{indiciae5a8a6a6d2ed5,
  title = {Geologic map of the Chattahoochee Roadless Area, Towns, Union, and White counties, Georgia},
  author = {A. E. Nelson},
  year = {1983},
  doi = {10.3133/mf1502a},
  url = {https://pubs.usgs.gov/publication/mf1502A},
  note = {Source identifier: mf1502A}
}