@misc{indiciae23d1c22cc34a,
  title = {Hydrogeology of the Pottsville Formation in northeastern Ohio},
  author = {Alan C. Sedam},
  year = {1973},
  doi = {10.3133/ha494},
  url = {https://pubs.usgs.gov/publication/ha494},
  note = {Source identifier: ha494}
}