@misc{indiciaec083cbdb36f3,
  title = {Nutrient sources within the Upper Mississippi River Basin, Minnesota and Wisconsin, 1991-93},
  author = {Sharon E. Kroening},
  year = {1998},
  doi = {10.3133/fs12198},
  url = {https://pubs.usgs.gov/publication/fs12198},
  note = {Source identifier: fs12198}
}