@misc{indiciaee4c19f6aa8b3,
  title = {Shallow coal exploration drill-hole data--Alabama, Georgia, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, South Carolina, Tennessee, and Texas},
  author = {Brett J. Valentine and Kristin O. Dennen},
  year = {2012},
  doi = {10.3133/ofr20111261},
  url = {https://pubs.usgs.gov/publication/ofr20111261},
  note = {Source identifier: ofr20111261}
}