@misc{indiciae19d24731e616,
  title = {Water-table, surface-drainage, and engineering soils map of the St. Georges area, Delaware},
  author = {John K. Adams and Durward H. Boggess},
  year = {1963},
  doi = {10.3133/ha60},
  url = {https://pubs.usgs.gov/publication/ha60},
  note = {Source identifier: ha60}
}