@misc{indiciaee972215b1576,
  title = {Water-table, surface-drainage, and engineering soils map of the Wilmington area, Delaware},
  author = {John K. Adams and Durward H. Boggess},
  year = {1964},
  doi = {10.3133/ha79},
  url = {https://pubs.usgs.gov/publication/ha79},
  note = {Source identifier: ha79}
}