@misc{indiciae9ba13971d9b4,
  title = {Use of electrical resistivity to detect underground mine voids in Ohio},
  author = {Rodney A. Sheets},
  year = {2002},
  doi = {10.3133/wri024041},
  url = {https://pubs.usgs.gov/publication/wri024041},
  note = {Source identifier: wri024041}
}