@misc{indiciaed2d0e8a9c907,
  title = {Dye tracer tests to determine time-of-travel in Iowa streams, 1990–2006},
  author = {Daniel E. Christiansen},
  year = {2009},
  doi = {10.3133/ds444},
  url = {https://pubs.usgs.gov/publication/ds444},
  note = {Source identifier: ds444}
}