@misc{indiciae647a46a36155,
  title = {Geologic map of parts of the Burlington and Addyston quadrangles, Boone County, Kentucky},
  author = {A. B. Gibbons},
  year = {1972},
  doi = {10.3133/gq1025},
  url = {https://pubs.usgs.gov/publication/gq1025},
  note = {Source identifier: gq1025}
}