@misc{indiciae59c8dd655c94,
  title = {Quaternary geologic map of the Dakotas 4 degrees x 6 degrees quadrangle, United States},
  author = {J.P. Bluemle and Lee Clayton and F.V. Steece and M.J. Tipton and R.F. Bretz and J.E. Goebel and D. S. Fullerton},
  year = {1995},
  doi = {10.3133/i1420(nl14)},
  url = {https://pubs.usgs.gov/publication/i1420(NL14)},
  note = {Source identifier: i1420(NL14)}
}