@misc{indiciaea8d30bbd6661,
  title = {USGS GeoData Digital Raster Graphics},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2001},
  doi = {10.3133/fs08801},
  url = {https://pubs.usgs.gov/publication/fs08801},
  note = {Source identifier: fs08801}
}