TY  - RPRT
TI  - Palynology in coal systems analysis-The key to floras, climate, and stratigraphy of coal-forming environments
AU  - D. J. Nichols
PY  - 2005
DO  - 10.1130/0-8137-2387-6.51
UR  - https://pubs.usgs.gov/publication/70035499
ID  - 70035499
ER  -