@misc{indiciaecf5f4883ed3c,
  title = {Geologic map of the Leesburg quadrangle, north-central Kentucky},
  author = {Roberts Manning Wallace},
  year = {1976},
  doi = {10.3133/gq1328},
  url = {https://pubs.usgs.gov/publication/gq1328},
  note = {Source identifier: gq1328}
}