@misc{indiciae0770ec4ff43f,
  title = {Water-table, surface-drainage, and engineering soils map of the Newark area, Delaware},
  author = {Durward H. Boggess and John K. Adams},
  year = {1963},
  doi = {10.3133/ha64},
  url = {https://pubs.usgs.gov/publication/ha64},
  note = {Source identifier: ha64}
}