@misc{indiciae487be662b182,
  title = {Geologic map of the Shepherdsville quadrangle, Bullitt County, Kentucky},
  author = {Roy Clark Kepferle},
  year = {1968},
  doi = {10.3133/gq740},
  url = {https://pubs.usgs.gov/publication/gq740},
  note = {Source identifier: gq740}
}