@misc{indiciae92b2b09d1ab2,
  title = {Gasfields in Devonian black shale and Landsat lineaments in parts of Ohio, Kentucky, West Virginia, and Pennsylvania},
  author = {George Willis Colton},
  year = {1977},
  doi = {10.3133/ofr77864},
  url = {https://pubs.usgs.gov/publication/ofr77864},
  note = {Source identifier: ofr77864}
}