@misc{indiciaeddc2e5797dc7,
  title = {Geologic map of the Brush Grove quadrangle, Nelson and Washington Counties, Kentucky},
  author = {Warren Lee Peterson},
  year = {1973},
  doi = {10.3133/gq1076},
  url = {https://pubs.usgs.gov/publication/gq1076},
  note = {Source identifier: gq1076}
}