@misc{indiciaead71772a1812,
  title = {Palynology in coal systems analysis-The key to floras, climate, and stratigraphy of coal-forming environments},
  author = {D. J. Nichols},
  year = {2005},
  doi = {10.1130/0-8137-2387-6.51},
  url = {https://pubs.usgs.gov/publication/70035499},
  note = {Source identifier: 70035499}
}