@misc{indiciae6de6e160e892,
  title = {Source and origin of Roxana Silt and middle Wisconsinan midcontinent glacial activity},
  author = {W.H. Johnson and L.R. Follmer},
  year = {2017},
  doi = {10.1016/0033-5894(89)90040-9},
  url = {https://pubs.usgs.gov/publication/70015386},
  note = {Source identifier: 70015386}
}