Betula ajatica
- Citations total:
- 3
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| details | Cenomanian | Turonian | USSR(Kazakh SSR) | Barbashinova,V.N. The stratigraphy of Mesozoic deposits of the Turgay Plain, based on the study of spores and pollen assemblages. | 1954 |
| details | Early Cretaceous | USSR(Kazakh SSR) | Barbashinova,V.N. Spore and pollen complexes of Mesozoic Layers of the northern part of the Turgayskaya Basin | 1956 | |
| details | Late Cretaceous | USSR(Kazakh SSR) | Barbashinova,V.N. Spore and pollen complexes of Mesozoic Layers of the northern part of the Turgayskaya Basin | 1956 |