@misc{indiciae81164cdc22ae,
  title = {Water-table, surface-drainage, and engineering soils map of the Harrington quadrangle, Delaware},
  author = {Christian F. Davis and Durward H. Boggess},
  year = {1964},
  doi = {10.3133/ha136},
  url = {https://pubs.usgs.gov/publication/ha136},
  note = {Source identifier: ha136}
}