@misc{indiciae85524d7e0b9a,
  title = {Simulation of ground-water flow in the lower sand unit of the Potomac-Raritan-Magothy aquifer system, Philadelphia, Pennsylvania},
  author = {R. A. Sloto},
  year = {1988},
  doi = {10.3133/wri864055},
  url = {https://pubs.usgs.gov/publication/wri864055},
  note = {Source identifier: wri864055}
}