@misc{indiciaeb47c30e1d635,
  title = {Map showing bedrock topography and subcrop of a selected bed beneath alluvial deposits of part of the Wilson Quadrangle, Henderson County, Kentucky},
  author = {A. E. Smith and T.E. Ball},
  year = {1974},
  doi = {10.3133/i859},
  url = {https://pubs.usgs.gov/publication/i859},
  note = {Source identifier: i859}
}