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| details | Gedinnian | Givetian | Spitsbergen | Kedves,M. Introduction to the palynology of Pre-Quaternary deposits | 1986 |
| details | Nd | Nd | Edwards,D. et al. In situ, pollen and spores in plant evolution. 14A -Review of in situ, spores in early land plants. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) | 1996 |