@misc{indiciaec0bad7c4c0d5,
  title = {Geologic map of the Robards quadrangle, Henderson and Webster counties, Kentucky},
  author = {G. M. Fairer},
  year = {1973},
  doi = {10.3133/gq1084},
  url = {https://pubs.usgs.gov/publication/gq1084},
  note = {Source identifier: gq1084}
}