@misc{indiciae25a5c10054cd,
  title = {Land use and land cover, 1974-76, Baltimore, Maryland; Pennsylvania; Virginia; West Virginia},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/l113},
  url = {https://pubs.usgs.gov/publication/l113},
  note = {Source identifier: l113}
}