Betula ajakensis
- Citations total:
- 3
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| details | Late Cretaceous | USSR(Yakut ASSR) | Bolkhovitina,N.A. Spore-pollen complexes from the Mesozoic deposits of the Vilyuy Basin and their importance for stratigraphy. | 1959 | |
| details | Senonian | USSR(Siberia) | Chlonova,A.F. Palynological characteristics of Cretaceous Layers in Siberia and the Far East. | 1971 | |
| original | Cenomanian | USSR(Urals) | Bolkhovitina,N.A. Spore and pollen characteristics of Cretaceous layers in the Central Regions of the USSR. | 1953 |