@misc{indiciae43a7549887d8,
  title = {Palynological investigations in the Pennsylvanian of Kentucky},
  author = {Robert M. Kosanke},
  year = {1969},
  doi = {10.3133/ofr69141},
  url = {https://pubs.usgs.gov/publication/ofr69141},
  note = {Source identifier: ofr69141}
}