| original |
Missourian |
|
Oklahoma |
Edwards,W.A. Palynology of the Francis Shale (Pennsylvanian) from near Ada, Oklahoma. |
1966 |
| original |
Stephanian |
|
Pennsylvania |
Clendening,J.A. Schopfipollenites in the Washington Formation, Dunkard Group, Upper Pennsylvanian of West Virginia and Pennsylvania. |
1967 |
| original |
Wolfcampian |
|
Arizona |
Kremp,K.N. Palynology of a Late Paleozoic Coal from fossil Creek Canyon, Arizona. |
1975 |
| original |
Pennsylvanian |
|
Iowa |
Ravn,R.L. An introduction to the stratigraphic palynology of the Cherokee Group (Pennsylvanian) coals of Iowa. |
1979 |
| original |
Atokan |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| original |
Atokan |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |
| original |
Atokan |
|
Iowa |
Ravn,R.L. Palynostratigraphy of the Lower and Middle Pennsylvanian Coals of Iowa |
1986 |