@misc{indiciaeadb9e68156e8,
  title = {Geochemical analyses and summaries of carbonate rocks from Kentucky},
  author = {Jon J. Connor},
  year = {1981},
  doi = {10.3133/ofr81509},
  url = {https://pubs.usgs.gov/publication/ofr81509},
  note = {Source identifier: ofr81509}
}