@misc{indiciae10198df8acca,
  title = {Altitude and configuration of the potentiometric surface in Wallace Township, Chester County, Pennsylvania, February 1996 through June 1997},
  author = {Kenneth S. Eden and Frank M. Schneider},
  year = {1998},
  doi = {10.3133/ofr98187},
  url = {https://pubs.usgs.gov/publication/ofr98187},
  note = {Source identifier: ofr98187}
}