@misc{indiciae12a61d9c2a75,
  title = {Map showing bedrock topography and subcrop of selected beds beneath alluvial deposits of the Curdsville Quadrangle, western Kentucky},
  author = {R. L. Norris},
  year = {1973},
  doi = {10.3133/i765},
  url = {https://pubs.usgs.gov/publication/i765},
  note = {Source identifier: i765}
}