| details |
Early Permian |
|
USSR(Ukrainian SSR) |
Bagdasaryan,L.L. Micropaleophytological studies of Paleozoic oil in the South European part of the USSR. (In: Palynology in Petroleum Geology. N.M.Ivanova, editor) |
1971 |
| details |
Givetian |
|
USSR(Bashkir ASSR) |
Chibrikova,E.V. Stratigraphy of Devonian and older Paleozoic deposits of the Southern Urals and the Pre-Urals (According to plant Microfssils). |
1977 |
| details |
Givetian |
|
USSR(Ukrainian SSR) |
Raskatova,L.G. A detailed stratigraphic subdivision of the Devonian of the Central Devonian Field in the light of palynological evidence. |
1974 |