@misc{indiciaec74307253b4e,
  title = {Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Valley and West Brandywine townships, Chester County, Pennsylvania, May 1992 through August 1993},
  author = {J.E. McGovern and April Bossert and W.C. Wettstein},
  year = {1996},
  doi = {10.3133/ofr96339},
  url = {https://pubs.usgs.gov/publication/ofr96339},
  note = {Source identifier: ofr96339}
}