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Geolocation
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Author - title
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Year
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| details | Givetian | USSR(European) | Filimonova,A.B. Spore complexes of the Middle and Upper Devonian boundary Layers in the Volga-Ural Province. | 1957 | |
| details | Givetian | USSR(Belorussian SSR) | Kedo,G.I. Spores of the Middle Devonian of the Northeast of Belorussian Ssr | 1955 | |
| original | Frasnian | USSR(Russian Platform) | Naumova,S.N. Spore-pollen complexes of the Upper Devonian of the Russian Platform and their significance for stratigraphy | 1953 |