@misc{indiciaeab271822c602,
  title = {Maps showing selected deep wells drilled for oil or gas in the Appalachian Basin},
  author = {L.G. Wallace and Wallace De Witt},
  year = {1975},
  doi = {10.3133/i936},
  url = {https://pubs.usgs.gov/publication/i936},
  note = {Source identifier: i936}
}