@misc{indiciaeeabcf04ccb3c,
  title = {Geologic map of part of the Madison East quadrangle, Trimble and Carroll Counties, Kentucky},
  author = {A. B. Gibbons},
  year = {1978},
  doi = {10.3133/gq1471},
  url = {https://pubs.usgs.gov/publication/gq1471},
  note = {Source identifier: gq1471}
}