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Author - title
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| details | Triassic | Nd | Osborn,J.M. et al. Comparative ultrastructure of fossil gymnosperm pollen and its phylogenetic implications. (In: Ultrastructure of Fossil Spores and Pollen. M.H.Kurmann and J.A.Doyle, editors) | 1994 | |
| details | Nd | Nd | Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. | 1995 |