@misc{indiciae702ac9528243,
  title = {Altitude and configuration of the potentiometric surface in the Triassic sandstones and shales, northeastern Chester County, Pennsylvania, September 1987 through January 1988},
  author = {Lisa A. Senior and John A. Garges},
  year = {1989},
  doi = {10.3133/wri894043},
  url = {https://pubs.usgs.gov/publication/wri894043},
  note = {Source identifier: wri894043}
}