@misc{indiciaec53b58fcb2fc,
  title = {Absence of Altonian glaciation in Illinois},
  author = {B. Brandon Curry},
  year = {2017},
  doi = {10.1016/0033-5894(89)90081-1},
  url = {https://pubs.usgs.gov/publication/70015807},
  note = {Source identifier: 70015807}
}