TY  - RPRT
TI  - Palynology, petrography and geochemistry of the Sewickley coal bed (Monongahela Group, Late Pennsylvanian), Northern Appalachian Basin, USA
AU  - C.F. Eble
AU  - B.S. Pierce
AU  - W.C. Grady
PY  - 2003
DO  - 10.1016/s0166-5162(03)00110-1
UR  - https://pubs.usgs.gov/publication/70025433
ID  - 70025433
ER  -