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Author - title
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| details | Eifelian | Givetian | USSR(Kaliningrad) | Yalysheva,A.A. Palynostratigraphy of Devonian deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) | 1990 |
| details | Eifelian | Frasnian | USSR(Kaliningrad) | Yalysheva,A.A. Palynostratigraphy of Devonian deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) | 1990 |