@misc{indiciae0eb58725b755,
  title = {Altitude and configuration of the potentiometric surface in Plumstead Township, Bucks County, Pennsylvania, June 1991 through November 1991},
  author = {Curtis L. Schreffler},
  year = {1993},
  doi = {10.3133/ofr9327},
  url = {https://pubs.usgs.gov/publication/ofr9327},
  note = {Source identifier: ofr9327}
}