@misc{indiciae2dab6e725275,
  title = {Quaternary geologic map of the Lake Superior 4 degrees x 6 degrees quadrangle, United States and Canada},
  author = {David S. Fullerton and D.M. Mickelson and W.R. Cowan and J.E. Goebel},
  year = {1984},
  doi = {10.3133/i1420(nl16)},
  url = {https://pubs.usgs.gov/publication/i1420(NL16)},
  note = {Source identifier: i1420(NL16)}
}