@misc{indiciae80bd86cc415f,
  title = {Relation of ground-water quality to land use in the Philadelphia, Pennsylvania-Camden, New Jersey area},
  author = {Ray S. Blickwedel and C. R. Wood},
  year = {1989},
  doi = {10.3133/wri884211},
  url = {https://pubs.usgs.gov/publication/wri884211},
  note = {Source identifier: wri884211}
}