@misc{indiciaece41fd231bac,
  title = {Surface water supply of the United States, 1950, Part V, Hudson Bay and upper Mississippi River basins},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1952},
  doi = {10.3133/wsp1175},
  url = {https://pubs.usgs.gov/publication/wsp1175},
  note = {Source identifier: wsp1175}
}