Betula occidentalis
- Citations total:
- 3
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Author - title
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| details | Miocene | Poland | MackŠ²,S. Pollen grains and spores from Miocene Brown Coals in Lower Silesia.I. | 1959 | |
| details | Paleogene | Neogene | Poland | Grabowska,I. Flora of the Palaeogene and the Neogene. (In: Catalogue of Fossil. Part 3A. Cainozoic, Tertiary. J.Czerminski, editor) | 1977 |
| details | Quaternary | Wyoming | Santucci,V.L. The Yellowstone Paleontological Survey. | 1998 |