00571naa#a2200169#i#450# EN\\bibl\46970 20241221195717.6 1681-1208 20081025b2008####ek#y0engy0150####ca RU Conodont stratigraphy and correlation of the Ordovician volcanogenic and volcanogenic sedimentary sequences in the South Urals Journal article Moscow Geophysical Center of the Russian Academy of Sciences 2008 7 с. Journal article local Dubinina S V Ryazantsev A V rjes.ru