@misc{indiciae8ef7924c67ca,
  title = {Using a Geographic Information System to determine the relation between stream quality and geology in the Roberts Creek watershed, Clayton County, Iowa},
  author = {Stephen J. Kalkhoff},
  year = {2007},
  doi = {10.1111/j.1752-1688.1993.tb03261.x},
  url = {https://pubs.usgs.gov/publication/70169045},
  note = {Source identifier: 70169045}
}