@misc{indiciaed9ba63d661aa,
  title = {Quaternary geologic map of the Chicago 4 degrees x 6 degrees quadrangle, United States},
  author = {Ned K. Bleuer and David M. Mickelson and William R. Farrand and Richard P. Goldthwait and David S. Fullerton},
  year = {1983},
  doi = {10.3133/i1420(nk16)},
  url = {https://pubs.usgs.gov/publication/i1420(NK16)},
  note = {Source identifier: i1420(NK16)}
}