@misc{indiciaeccd9b7079fb8,
  title = {Geologic map of the Worthville quadrangle, north-central Kentucky},
  author = {A. B. Gibbons},
  year = {1975},
  doi = {10.3133/gq1265},
  url = {https://pubs.usgs.gov/publication/gq1265},
  note = {Source identifier: gq1265}
}