@misc{indiciae318fc8943b1a,
  title = {Preliminary structure map of the Greenville Quadrangle, Muhlenberg County, Kentucky},
  author = {Thomas M. Kehn},
  year = {1970},
  doi = {10.3133/ofr70179},
  url = {https://pubs.usgs.gov/publication/ofr70179},
  note = {Source identifier: ofr70179}
}