@misc{indiciae25a705750362,
  title = {Altitude and configuration of the potentiometric surfaces of the upper and lower aquifer systems in Bridgeton, Nockamixon, and Tinicum Townships, Bucks County, Pennsylvania, April 1991 through April 1992},
  author = {B. Craig McManus and Cynthia J. Rowland},
  year = {1993},
  doi = {10.3133/wri924194},
  url = {https://pubs.usgs.gov/publication/wri924194},
  note = {Source identifier: wri924194}
}