@misc{indiciaec63350fc420d,
  title = {Late Ordovician-Early Silurian chitinozoans from north-eastern and western Illinois, USA},
  author = {A. Butcher and Donald G. Mikulic and Joanne Kluessendorf},
  year = {2010},
  doi = {10.1016/j.revpalbo.2009.11.002},
  url = {https://pubs.usgs.gov/publication/70035549},
  note = {Source identifier: 70035549}
}