| original |
Early Permian |
|
China(Liaoning) |
Imgrund,R. The sporites of the Kaiping Basin, their paleontologic and stratigraphic treatment in view of a parallelization with the Ruhr Carboniferous and the Pennsylvanian of Illinois. |
1952 |
| details |
Early Permian |
|
China(Liaoning) |
Potonie,R. et al. The spore dispersae of the Rhur Carboniferous, their morphography and stratigraphy with reviews of species of other areas.Part 2 |
1956 |
| details |
Late Artinskian |
Early Kungurian |
Turkey |
Agrali,B. et al. Palynologic study of the coals of Hazro and estimation of the age of lacustrine horizons of the Permian-Carboniferous. |
1967 |