@misc{indiciae0263d8afa0cb,
  title = {Quality of surface waters of the United States, 1957, Parts 5 and 6, Hudson Bay and upper Mississippi River basins and Missouri River Basin},
  author = {S. K. Love},
  year = {1961},
  doi = {10.3133/wsp1521},
  url = {https://pubs.usgs.gov/publication/wsp1521},
  note = {Source identifier: wsp1521}
}