@misc{indiciae07fc94381d8b,
  title = {Water-table, surface-drainage, and engineering soils map of the Ellendale quadrangle, Delaware},
  author = {John K. Adams and Durward H. Boggess},
  year = {1964},
  doi = {10.3133/ha101},
  url = {https://pubs.usgs.gov/publication/ha101},
  note = {Source identifier: ha101}
}