@misc{indiciae88a114d3c1f7,
  title = {Principal oil and gas plays in the Appalachian Basin (Province 131)},
  author = {Wallace de Witt},
  year = {1993},
  doi = {10.3133/b1839i},
  url = {https://pubs.usgs.gov/publication/b1839I},
  note = {Source identifier: b1839I}
}