@misc{indiciae4b7db4d2053d,
  title = {Quaternary geology of Minnesota and parts of adjacent States},
  author = {Frank Leverett and F.W. Sardeson},
  year = {1932},
  doi = {10.3133/pp161},
  url = {https://pubs.usgs.gov/publication/pp161},
  note = {Source identifier: pp161}
}