@misc{indiciaec726b0aa7fe5,
  title = {Geologic map of the Campbellsburg quadrangle, north-central Kentucky},
  author = {W. C. Swadley and A. B. Gibbons},
  year = {1976},
  doi = {10.3133/gq1364},
  url = {https://pubs.usgs.gov/publication/gq1364},
  note = {Source identifier: gq1364}
}