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Author - title
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| details | Aptian | England | Dжring,H. Spore-stratigraphic comparison between the Wealdean of northern Germany and of Southern England | 1966 | |
| details | Aptian | USSR(Kazakh SSR) | Shvetsova,E.M. Spore and pollen assemblages of the Lower Cretaceous deposits of the eastern Ustyurt. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) | 1973 |