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Author - title
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Year
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| details | Kungurian | USSR(Aktyubinskaya) | Andreeva,E.M. et al. Palaeopalynology. (Three Volumes: Volume I: Methods. Volume II: Complexes of palynomorphs of the Precambrian-Holocene of the USSR. Volume III: Figures and Plates. Editor-I.M. Pokrovskaya) | 1966 | |
| details | Permian | USSR | Tchepikov,K. et al. Spore-pollen analysis of oil and Gas. | 1973 | |
| details | Permian | USSR | Chepikov,K.R. et al. Spores and pollen in oils and Gases as migration Indices. | 1971 |