@misc{indiciae926faf456074,
  title = {Altitude and configuration of the potentiometric surface in the Triassic sandstones and shales, northern Chester County, Pennsylvania, October 1989 through March 1990},
  author = {B. Craig McManus},
  year = {1990},
  doi = {10.3133/wri904114},
  url = {https://pubs.usgs.gov/publication/wri904114},
  note = {Source identifier: wri904114}
}