@misc{indiciaead36fbad351f,
  title = {Pennsylvania},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs03999},
  url = {https://pubs.usgs.gov/publication/fs03999},
  note = {Source identifier: fs03999}
}