@misc{indiciae7ced7f883c25,
  title = {A Topographic Field Trip of Washington, D.C. - A Cartographic Multimedia Application},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs17899},
  url = {https://pubs.usgs.gov/publication/fs17899},
  note = {Source identifier: fs17899}
}