@misc{indiciaeccbf0255fcc2,
  title = {Geochemistry of fluoride in the Black Creek aquifer system of Horry and Georgetown Counties, South Carolina--and its physiological implications},
  author = {Allen L. Zack},
  year = {1979},
  doi = {10.3133/ofr791067},
  url = {https://pubs.usgs.gov/publication/ofr791067},
  note = {Source identifier: ofr791067}
}