@misc{indiciaefc04958a09ca,
  title = {The National Map - Pennsylvania Pilot Project},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2001},
  doi = {10.3133/fs12001},
  url = {https://pubs.usgs.gov/publication/fs12001},
  note = {Source identifier: fs12001}
}