@misc{indiciae60af5bb2df8d,
  title = {Map showing bedrock topography and subcrop of selected beds beneath alluvial deposits of the Spottsville Quadrangle, Henderson County, Kentucky},
  author = {R. L. Norris},
  year = {1973},
  doi = {10.3133/i814},
  url = {https://pubs.usgs.gov/publication/i814},
  note = {Source identifier: i814}
}