@misc{indiciaedc3a64596248,
  title = {Uncovering Hidden Hazards in the Mississippi Valley},
  author = {Thomas G. Hildenbrand and Victoria E. Langenheim and Eugene Schweig and Peter H. Stauffer and James W. Hendley},
  year = {1996},
  doi = {10.3133/fs20096},
  url = {https://pubs.usgs.gov/publication/fs20096},
  note = {Source identifier: fs20096}
}