@misc{indiciaeb8a939767b39,
  title = {Map showing bedrock topography and subcrop of selected beds beneath alluvial deposits of the Sacramento Quadrangle, western Kentucky},
  author = {A. E. Smith},
  year = {1977},
  doi = {10.3133/i1036},
  url = {https://pubs.usgs.gov/publication/i1036},
  note = {Source identifier: i1036}
}