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Author - title
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| details | Valanginian | USSR(Ukrainian SSR) | Voronova,M.A. Palynological characterization of Upper Jurassic Lower Cretaceous boundary formations of the Dnieper-Donets Depression. | 1971 | |
| details | Valanginian | USSR(WSL) | Golbert,A.V. et al. Paleolandscapes of West Siberia in Jurassic, Cretaceous, and Paleogene. | 1968 |