@misc{indiciaea33cea245276,
  title = {Geohydrology and ground-water resources of Philadelphia, Pennsylvania},
  author = {Gary N. Paulachok},
  year = {1991},
  doi = {10.3133/wsp2346},
  url = {https://pubs.usgs.gov/publication/wsp2346},
  note = {Source identifier: wsp2346}
}