@misc{indiciaeafe418fc5774,
  title = {Geologic map of part of the Bethlehem quadrangle, Trimble and Oldham Counties, Kentucky},
  author = {W. C. Swadley},
  year = {1977},
  doi = {10.3133/gq1436},
  url = {https://pubs.usgs.gov/publication/gq1436},
  note = {Source identifier: gq1436}
}