@misc{indiciae797a9127c87d,
  title = {Summary of the hydrogeologic regime as related to environmental characteristics, Allegheny County, Pennsylvania},
  author = {Seymour Subitzky},
  year = {1975},
  doi = {10.3133/mf641a},
  url = {https://pubs.usgs.gov/publication/mf641A},
  note = {Source identifier: mf641A}
}