@misc{indiciae7f1b4d67e2e3,
  title = {How dependable are the ground-water of the greater Philadelphia-South Jersey area?},
  author = {H.C. Barksdale},
  year = {1951},
  doi = {10.3133/ofr5196},
  url = {https://pubs.usgs.gov/publication/ofr5196},
  note = {Source identifier: ofr5196}
}