@misc{indiciaeb5553a3734d6,
  title = {Map showing foundation and excavation conditions in the Burtonville quadrangle, Kentucky},
  author = {Ernest Dobrovolny and R. H. Morris},
  year = {1965},
  doi = {10.3133/i460},
  url = {https://pubs.usgs.gov/publication/i460},
  note = {Source identifier: i460}
}