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Author - title
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Year
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| details | Llanvirnian | Llandeilian | Spain | Fombella,M.A. et al. New palynological results from the Oville Formation at Southwest Vozmediano, Leon (northwestern Spain). (In: Commision Internationale De | 1996 |
| details | Ashgillian | Poland | Kremer,B. Acritarchs from the Upper Ordovician of southern Holy Cross Mountains, Poland. | 2001 |