@misc{indiciae23b470aebb87,
  title = {Late-glacial - postglacial vegetational history of the Pretty Lake region, northeastern Indiana},
  author = {Alice Simms Williams},
  year = {1974},
  doi = {10.3133/pp686b},
  url = {https://pubs.usgs.gov/publication/pp686B},
  note = {Source identifier: pp686B}
}