@misc{indiciaef8a64b4fb5c6,
  title = {An experiment to test hole-to-hole resistivity measurements for locating mine openings in coal seams},
  author = {Jeffrey J. Daniels and James Henry Scott},
  year = {1980},
  doi = {10.3133/ofr80895},
  url = {https://pubs.usgs.gov/publication/ofr80895},
  note = {Source identifier: ofr80895}
}