@misc{indiciae935a69f42f5a,
  title = {Subsurface geology and ground-water resources of the Jackson Purchase region, Kentucky},
  author = {R. W. Davis and T. William Lambert and Arnold J. Hansen},
  year = {1973},
  doi = {10.3133/wsp1987},
  url = {https://pubs.usgs.gov/publication/wsp1987},
  note = {Source identifier: wsp1987}
}