Indusium: Verskil tussen weergawes
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Lyn 14:
* {{en}} Gradstein, F.M.; Ogg, J.G.; Schmitz, M.D. & Ogg, G.M.; '''2012''': ''A Geologic Time Scale 2012'', Elsevier, ISBN 0444594256.
* {{en}} Kiparisova, L.D. & Popov, J.N.; '''1956''': ''Gliederung der Unteren Abteilung des Systems Trias in Stufen'', Doklady Akademii Nauk SSSR '''109(4)''', pp. 842-845.
[[Kategorie:Trias]]
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