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From
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To
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Geolocation
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Author - title
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Year
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| details | Late Tatarian | USSR(Komi ASSR) | Chalyashev,V.I. On stratigraphy of the Upper Permian and Triassic of northern Pre-Ural | 1963 | |
| details | Early Permian | USSR(Urals) | Bulatov,D.I. Agapovskaya strata -Permian deposits of Magnitogorsk Megasynclinorium | 1968 | |
| details | Tatarian | USSR(Arkhangelsk Oblast) | Bazhenova,S.N. et al. Stratigraphy of the Tatarian Stage of the Volshoi Severnoi Duina and Usta River Interfluve | 1977 |