@misc{indiciae1084d5b5770d,
  title = {Harrodsburg limestone in Kentucky},
  author = {Edward G. Sable and Roy Clark Kepferle and Warren Lee Peterson},
  year = {1966},
  doi = {10.3133/b1224i},
  url = {https://pubs.usgs.gov/publication/b1224I},
  note = {Source identifier: b1224I}
}