@misc{indiciae95c46a20a770,
  title = {Log of core from a drill hole in southeastern Kentucky},
  author = {Russell G. Ping},
  year = {1975},
  doi = {10.3133/ofr75563},
  url = {https://pubs.usgs.gov/publication/ofr75563},
  note = {Source identifier: ofr75563}
}