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Author - title
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| details | Middle Eocene | Oligocene | E.Germany | Krutzsch,W. Eocene spore stratigraphy: Table 2. (Stratigraphic classification of spores from Upper Tertiary in North Central Europe.) | 1966 |
| details | Late Eocene | Early Oligocene | China(Shansi) | Zhang,X. Early Tertiary palynological assemblages from northern Shanxi and a discussion on their geological Age | 1988 |