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Author - title
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details | Oligocene | USSR(Caucasus) | Chiguryaeva,A.A. Contributions to the Oligocene flora of the Maykop Formation, Caucasus (spores and pollen). | 1951 | |
details | Early Oligocene | USSR(Kazakh SSR) | Abuzyarova,R.Y. Results of spore-pollen investigations of Oligocene deposits of Shintuzsaya (Turgay) | 1955 | |
details | Middle Oligocene | USSR(Kazakh SSR) | Abuzyarova,R.Y. Spore-pollen complexes of the Indrikoteriev Suite of the Akmol, (Turgay Basin). | 1958 |