@misc{indiciae9bc4c6abb2d4,
  title = {Land use and land cover and associated maps for Baltimore, Maryland, Virginia, Pennsylvania, and West Virginia (Pa. and W. Va. portions only)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/ofr77114},
  url = {https://pubs.usgs.gov/publication/ofr77114},
  note = {Source identifier: ofr77114}
}