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| details | Hauterivian | Aptian | USSR(Far East) | Chlonova,A.F. Palynological characteristics of Cretaceous Layers in Siberia and the Far East. | 1971 |
| details | Aptian | USSR(European) | Voronova,M.A. Subdivision of Lower Cretaceous deposits in the northwestern part of the Dnieper-Donetsk Depression on the ground of resuts of sporopollen analysis. (In: The Importance of Palynological Analysis for the Stratigraphic and Paleofloristic Investigations. M.I. Nejshtadt, editor. Papers for the Second International Palynology Conference., Utrecht,1966) | 1966 |