@misc{indiciae037afcf137fe,
  title = {Water-table, surface-drainage, and engineering soils map of the Harbeson quadrangle, Delaware},
  author = {John K. Adams and Durward H. Boggess},
  year = {1964},
  doi = {10.3133/ha108},
  url = {https://pubs.usgs.gov/publication/ha108},
  note = {Source identifier: ha108}
}