@misc{indiciae1a0b6955858c,
  title = {Geologic map of the Worthville Quadrangle, north-central Kentucky},
  author = {A. B. Gibbons},
  year = {1975},
  doi = {10.3133/ofr75113},
  url = {https://pubs.usgs.gov/publication/ofr75113},
  note = {Source identifier: ofr75113}
}