@misc{indiciae323a7b6c7336,
  title = {Land use and land cover, 1972, Washington, D.C.; Maryland, Virginia},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/l201},
  url = {https://pubs.usgs.gov/publication/l201},
  note = {Source identifier: l201}
}