@misc{indiciae38bc085ed324,
  title = {National Atlas Maps},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1993},
  doi = {10.3133/70039252},
  url = {https://pubs.usgs.gov/publication/70039252},
  note = {Source identifier: 70039252}
}