@misc{indiciaed5e37ff61300,
  title = {Nitrate and pesticides in surficial aquifers and trophic state and phosphorus sources for selected lakes, eastern Otter Tail County, west-central Minnesota, 1993-96},
  author = {J. F. Ruhl},
  year = {1997},
  doi = {10.3133/wri974085},
  url = {https://pubs.usgs.gov/publication/wri974085},
  note = {Source identifier: wri974085}
}