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Author - title
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| details | Nd | Nd | Winslow,M.R. Upper Mississippian and Pennsylvanian megaspores and other plant microfossils from Illinois. | 1959 | |
| details | Visean | Alportian | China(Kansu) | Zhu,H. A revised palynological Sub-Division of the Namurian of Jingyuan, Northwest China | 1993 |