@misc{indiciae8bf313f945f1,
  title = {Geologic map of the Waterford quadrangle, north-central Kentucky},
  author = {Stanley J. Luft},
  year = {1977},
  doi = {10.3133/gq1432},
  url = {https://pubs.usgs.gov/publication/gq1432},
  note = {Source identifier: gq1432}
}