@misc{indiciaeac5f7c711647,
  title = {The flora of the New Albany shale; Part 2, The Calamopityeae and their relationships},
  author = {Charles B. Read},
  year = {1937},
  doi = {10.3133/pp186e},
  url = {https://pubs.usgs.gov/publication/pp186E},
  note = {Source identifier: pp186E}
}