@misc{indiciaee832c78ea334,
  title = {Simple Bouguer gravity map of part of the Carolina slate belt including the Haile and Brewer mine areas, north-central South Carolina},
  author = {Peter Popenoe and Henry Bell},
  year = {1975},
  doi = {10.3133/gp904},
  url = {https://pubs.usgs.gov/publication/gp904},
  note = {Source identifier: gp904}
}