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Author - title
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| details | Middle Eocene | Early Oligocene | Kazakstan | Akhmeteev,M.A. et al. Climates of the Late Eocene and Early Oligocene. (In: Late Eocene-Early Oligocene geological and Biotical events on the Territory of the Former Soviet Union. Part 2: the regional geology of the Upper Eocene and Lower Oligocene. V.A.Krasheninnikov and M.A.Akhmetiev, editors) | 1996 |
| details | Paleogene | Russia(Novosibirsk) | 2004 |