@misc{indiciae21e4f6eb0a4b,
  title = {Surface water supply of the United States, 1957, part 5, Hudson Bay and upper Mississippi River Basins},
  author = {J. V. B. Wells},
  year = {1959},
  doi = {10.3133/wsp1508},
  url = {https://pubs.usgs.gov/publication/wsp1508},
  note = {Source identifier: wsp1508}
}