@misc{indiciaec5aec7b119f9,
  title = {Altitude and configuration of the potentiometric surface in Springfield Township, Bucks County, Pennsylvania, April 1991 through October 1991},
  author = {Curtis L. Schreffler},
  year = {1993},
  doi = {10.3133/wri924183},
  url = {https://pubs.usgs.gov/publication/wri924183},
  note = {Source identifier: wri924183}
}