TY  - RPRT
TI  - Identification of plant megafossils in Pennsylvanian-age coal
AU  - R.B. Winston
PY  - 1989
DO  - 10.1016/0034-6667(89)90024-9
UR  - https://pubs.usgs.gov/publication/70016407
ID  - 70016407
ER  -