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| details | Toarcian | USSR(Ukrainian SSR) | Lapteva,A.M. Palynological basis for the stratigraphic subdivision of the Jurassic in the Northwestern Confines of the Donets Basn. | 1967 | |
| details | Toarcian | USSR(Ukrainian SSR) | Semenova,E.V. Spore-pollen complexes of Triassic (Ret), and Lower and Middle Jurassic of the northwestern part of the Donetz Basin. (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 |