@misc{indiciae41bc6e0eade0,
  title = {Hydrologic unit map-1974, State of Minnesota},
  author = {U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/70175791},
  url = {https://pubs.usgs.gov/publication/70175791},
  note = {Source identifier: 70175791}
}