| details |
Tertiary |
|
USSR(Ukrainian SSR) |
Zaklinskaya,E.D. Description of some species of pollen and spores recovered from Tertiary deposits of Pasekovo Quarry, Voronezh District. |
1953 |
| details |
Early Oligocene |
|
USSR(Pavlodarskaya) |
Zaklinskaya,E.D. Material on the history of the flora and vegetation of the Paleogene of northern Kazakhstan in the area of Pavlodar Pr-Irtish. |
1953 |
| details |
Pliocene |
|
USSR(Siberia) |
Samigulina,E.P. Spore morhology of some plant fossils. (In: Sbornik po voprosam stratigrafii.) |
1957 |