@misc{indiciae47845ae5b7e8,
  title = {Hydrologic data for the Potomac Formation in New Castle County, Delaware},
  author = {Mary M. Martin and Judith M. Denver},
  year = {1982},
  doi = {10.3133/ofr81916},
  url = {https://pubs.usgs.gov/publication/ofr81916},
  note = {Source identifier: ofr81916}
}