| details |
Tournaisian |
|
USSR(Kazakh SSR) |
Stanichnikova,M.S. et al. Palynological characteristics of Permian and Carboniferous deposits of the southeast part of the Pre-Caspian Basin. (In: Palynological studies (Collected Articles) |
1976 |
| details |
Early Visean |
|
USSR(Urals) |
Sultanaev,A.A. Key sections. (In: Key sections and fauna of the Visean and Namurian Stages of Middle and Southern Urals) |
1978 |
| details |
Early Visean |
|
USSR(Kazakh SSR) |
Kukhtinov,D.A. et al. Carboniferous rock units of the eastern part of the Pricaspian Basin. |
1981 |