@misc{indiciae9be5de20a98e,
  title = {Geologic map of the Harrodsburg quadrangle, Mercer and Woodford Counties, Kentucky},
  author = {John Wing Allingham},
  year = {1972},
  doi = {10.3133/gq1020},
  url = {https://pubs.usgs.gov/publication/gq1020},
  note = {Source identifier: gq1020}
}