@misc{indiciae2b53afe9c721,
  title = {Fossil plants from the Colgate member of the Fox Hills sandstone and adjacent strata},
  author = {R.W. Brown},
  year = {1939},
  doi = {10.3133/pp189i},
  url = {https://pubs.usgs.gov/publication/pp189I},
  note = {Source identifier: pp189I}
}