@misc{indiciae04034dff0e5e,
  title = {Water-table contour map of the carbonate rocks of eastern Chester County, Pennsylvania, October 1983},
  author = {Ronald A. Sloto},
  year = {1984},
  doi = {10.3133/ofr84235},
  url = {https://pubs.usgs.gov/publication/ofr84235},
  note = {Source identifier: ofr84235}
}