@misc{indiciae8f978efc54fb,
  title = {Shallow coal exploration drill-hole data—Alabama, Georgia, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, South Carolina, Tennessee, and Texas},
  author = {Brett Valentine and Kristin O. Dennen},
  year = {2012},
  doi = {10.3133/ofr20111261a},
  url = {https://pubs.usgs.gov/publication/ofr20111261A},
  note = {Source identifier: ofr20111261A}
}