@misc{indiciae7deda05b4257,
  title = {Functional groups of fossil marattialeans: Chemotaxonomic implications for Pennsylvanian tree ferns and pteridophylls},
  author = {J. Psenicka and E.L. Zodrow and Maria Mastalerz and J. Bek},
  year = {2005},
  doi = {10.1016/j.coal.2004.10.001},
  url = {https://pubs.usgs.gov/publication/70029121},
  note = {Source identifier: 70029121}
}