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| details | Asselian | Ufimian | USSR(Urals) | Dyupina,G.V. Correlation of fauna zones and palynocomplexes in Lower Permian deposits of Central and Southern Uralia. (In: Stratigraphy and Correlation of Sediments Using Palynology Methods. Materials IV All-Union Palynological Conference. G.N.Papulov, editor) | 1983 |