@misc{indiciae1b29c48db4fd,
  title = {Palynological studies of Lower Pennsylvanian coal beds and adjacent strata of the proposed Pennsylvanian System stratotype in Virginia and West Virginia},
  author = {R.M. Kosanke},
  year = {1988},
  doi = {10.3133/pp1479},
  url = {https://pubs.usgs.gov/publication/pp1479},
  note = {Source identifier: pp1479}
}