| details |
Early Oligocene |
|
USSR(WSL) |
Boitsel,Z.A. et al. Oligocene spore-pollen complexes of the central part of the Western Siberian Lowlands |
1956 |
| details |
Late Oligocene |
|
USSR(WSL) |
Boitsel,Z.A. et al. Oligocene spore-pollen complexes of the central part of the Western Siberian Lowlands |
1956 |
| details |
Early Oligocene |
|
USSR(Kazakh SSR) |
Polukhina,V.A. Oligocene spore-pollen complexes of the northern part of the Turgay Basin |
1956 |
| details |
Middle Oligocene |
|
USSR(Kazakh SSR) |
Polukhina,V.A. Oligocene spore-pollen complexes of the northern part of the Turgay Basin |
1956 |
| details |
Oligocene |
|
USSR(Caucasus) |
Pokrovskaya,I.M. Plates of spores and pollen from Oligocene deposits of the north-western Caucasus and eastern Pre-Caucasus. |
1956 |