@misc{indiciae607b98f5655b,
  title = {Characterization of fill deposits in the Calumet region of northwestern Indiana and northeastern Illinois},
  author = {Robert T. Kay and Theodore K. Greeman and Richard F. Duwelius and Robin B. King and John E. Nazimek and David M. Petrovski},
  year = {1997},
  doi = {10.3133/wri964126},
  url = {https://pubs.usgs.gov/publication/wri964126},
  note = {Source identifier: wri964126}
}