@misc{indiciae3812fc890989,
  title = {Schlumberger electric soundings in the Charleston, S.C. earthquake area},
  author = {David L. Campbell},
  year = {1977},
  doi = {10.3133/ofr77617},
  url = {https://pubs.usgs.gov/publication/ofr77617},
  note = {Source identifier: ofr77617}
}