@misc{indiciaeb80b2b2f1bb6,
  title = {Land use and land cover, 1972, Wilmington, Delaware; New Jersey; Pennsylvania; Maryland},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/l38},
  url = {https://pubs.usgs.gov/publication/l38},
  note = {Source identifier: l38}
}