@misc{indiciaeaa5de6e1c49f,
  title = {Altitude and configuration of the potentiometric surface in Buckingham and Wrightstown townships, Bucks County, Pennsylvania, June 1992 through January 1993},
  author = {B. C. McManus and C.L. Schreffler and C.J. Rowland},
  year = {1994},
  doi = {10.3133/ofr93417},
  url = {https://pubs.usgs.gov/publication/ofr93417},
  note = {Source identifier: ofr93417}
}