@misc{indiciaeb42969c6aa00,
  title = {Index of surface-water records to September 30, 1967 - Part 5, Hudson Bay and upper Mississippi River basins},
  author = {H.P. Eisenhuth},
  year = {1968},
  doi = {10.3133/cir575},
  url = {https://pubs.usgs.gov/publication/cir575},
  note = {Source identifier: cir575}
}