@misc{indiciaeab9d0a335276,
  title = {A feasibility study to estimate minimum surface-casing depths of oil and gas wells to prevent ground-water contamination in four areas of western Pennsylvania},
  author = {T. F. Buckwalter and P. J. Squillace},
  year = {1995},
  doi = {10.3133/wri874136},
  url = {https://pubs.usgs.gov/publication/wri874136},
  note = {Source identifier: wri874136}
}