@misc{indiciae4269cb6514bc,
  title = {Electrical resistivity survey of the Bristol, Pennsylvania, area--A preliminary report},
  author = {H. Cecil Spicer},
  year = {1948},
  doi = {10.3133/ofr4824},
  url = {https://pubs.usgs.gov/publication/ofr4824},
  note = {Source identifier: ofr4824}
}