@misc{indiciaef2ee09e32bdd,
  title = {US GeoData Digital Line Graphs},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1996},
  doi = {10.3133/fs07896},
  url = {https://pubs.usgs.gov/publication/fs07896},
  note = {Source identifier: fs07896}
}