@misc{indiciaec374c22c0090,
  title = {Index of surface-water records to September 30, 1970; Part 5, Hudson Bay and Upper Mississippi River basins},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1971},
  doi = {10.3133/cir655},
  url = {https://pubs.usgs.gov/publication/cir655},
  note = {Source identifier: cir655}
}