TY  - RPRT
TI  - Changing patterns of Pennsylvanian coal-swamp vegetation and implications of climatic control on coal occurrence
AU  - T.L. Phillips
AU  - R.A. Peppers
PY  - 1984
DO  - 10.1016/0166-5162(84)90019-3
UR  - https://pubs.usgs.gov/publication/70013194
ID  - 70013194
ER  -