@misc{indiciae8d98f9fd285c,
  title = {Additions to some fossil floras of the western United States},
  author = {R.W. Brown},
  year = {1937},
  doi = {10.3133/pp186j},
  url = {https://pubs.usgs.gov/publication/pp186J},
  note = {Source identifier: pp186J}
}