@misc{indiciaeadde2bc45bed,
  title = {Borehole-wall imaging with acoustic and optical televiewers for fractured-bedrock aquifer investigations},
  author = {John H. Williams and Carole D. Johnson},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/70206367},
  note = {Source identifier: 70206367}
}