@misc{indiciaeed3f217530a1,
  title = {Geologic map of the Welchs Creek quadrangle, Butler and Grayson Counties, Kentucky},
  author = {Benjamin Gildersleeve},
  year = {1976},
  doi = {10.3133/gq1339},
  url = {https://pubs.usgs.gov/publication/gq1339},
  note = {Source identifier: gq1339}
}