@misc{indiciaefb84bac4312b,
  title = {Engineering geology of the Paducah East quadrangle in Kentucky},
  author = {Thomas C. Nichols},
  year = {1968},
  doi = {10.3133/b1258a},
  url = {https://pubs.usgs.gov/publication/b1258A},
  note = {Source identifier: b1258A}
}