| original |
Late Oligocene |
|
USSR(WSL) |
Filippova,E.A. Late Oligocene. (In: Stratigraphy of Mesozoic and Cenozoic Periods of Western Siberian Lowland. E.A.Filippova, editor) |
1957 |
| original |
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 |
| original |
Oligocene |
|
Czechoslovakia |
PacltovŠ,B. et al. The Oligocene pollen association in the Beds overlying the basalt effusion in the Cheb Basin. |
1958 |