@misc{indiciaed099b5aee1fd,
  title = {Palynological investigations in the Pennsylvanian of Kentucky; VI},
  author = {R.M. Kosanke},
  year = {1971},
  doi = {10.3133/ofr71174},
  url = {https://pubs.usgs.gov/publication/ofr71174},
  note = {Source identifier: ofr71174}
}