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| details | Volgian | USSR(European) | Dobrutskaya,N.A. Jurassic and Early Cretaceous spore-pollen assemblages of the northern part of the Russian Platform and their importace for stratigraphic and paleofloristic definition. (In: Mikrofossilii Drevneishikh Otlozhenii. T.F.Vozzhennikova and T.B.Timofeev, editors) | 1973 | |
| details | Wealden | France(Pas-de-Calais) | Delcourt,A.F. et al. Spores and pollen grains, Hystrichoshperes and Peridinians in the Wealdian of Feron-Glageon. | 1959 |