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Author - title
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Year
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details | Carboniferous | Permian | USSR(Irkutskaya Oblast) | Suslova,M.G. et al. New data on the stratigraphy of Upper Paleozoic Coal-bearing sediments in the Middle Priangarie | 1982 |
details | Early Eifelian | USSR(Kemerovskaya) | Chibrikova,E.V. et al. Correlation and age of the lower horizons of the Devonian of the Western Slopes of the Southern Urals, Priuralia and the Kuznetskii Coal Basin according to plant microfossils. | 1971 |