| link
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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 | Tatarian | USSR(Arkhangelsk Oblast) | Bazhenova,S.N. et al. Stratigraphy of the Tatarian Stage of the Volshoi Severnoi Duina and Usta River Interfluve | 1977 | |
| details | Permian | USSR(Urals) | Medvedeva,A.M. Palynological investigation of Petroleum | 1978 | |
| details | Permian | USSR(Bashkir ASSR) | Medvedeva,A.M. Palynological investigation of Petroleum | 1978 |