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Author - title
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Year
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| details | Late Oligocene | Early Miocene | USSR(Ukrainian SSR) | Shchekina,N.A. Flora of Brown Coal and Carbonaceous Clays from the Lower Part of the Poltava Suite of the environs of Kiev by spore Nd pollen analysis | 1962 |
| details | Oligocene | USSR(Ukrainian SSR) | Malyasova,E.S. Short description of spores and pollen from Oligocene deposits the Dzhankoy Area, (Crimea). | 1956 | |
| details | Tertiary | W.Germany | Kirchheimer,F. Corrosion of the pollen | 1935 |