@misc{indiciaed1551335700a,
  title = {Water-table map of Philadelphia, Pennsylvania, 1976-1980},
  author = {Gary N. Paulachok and C. R. Wood},
  year = {1984},
  doi = {10.3133/ha676},
  url = {https://pubs.usgs.gov/publication/ha676},
  note = {Source identifier: ha676}
}