| original |
Aptian |
Albian |
USSR(Kazakh SSR) |
Kruchinina,N.V. et al. Description of spores and pollen in Aptin-Albian deposits of Western Kazakhstan. (In: Atlas of Lower Cretaceous spore-pollen complexes of some regions of USSR. I.M.Pokyovsksys and N.K.Stel'mak, editors) |
1964 |
| original |
Aptian |
Albian |
USSR(WSL) |
Voitsel,Z.A. et al. Aptian-Albian. (In: Stratigraphy of the Mesozoic and Cenozoic of the Western Siberian Lowlands. V.F.Kozyreva, editor) |
1957 |
| original |
Aptian |
Albian |
USSR(WSL) |
Filippova,E.A. Aptian - Albian. (In: Stratigraphy of Mesozoic and Cenozoic Periods of Western Siberian Lowland. E.A.Filippova, editor) |
1957 |