@misc{indiciaefd44df72b53e,
  title = {Water-table, surface-drainage, and engineering soils map of the Clayton area, Delaware},
  author = {John K. Adams and Durward H. Boggess and O. J. Coskery},
  year = {1964},
  doi = {10.3133/ha83},
  url = {https://pubs.usgs.gov/publication/ha83},
  note = {Source identifier: ha83}
}