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Author - title
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Year
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| details | Devonian | Middle Pennsylvanian | China | Gao,L. Devonian and Carboniferous spores. (In: Palaeontological Atlas of Southwest China, Volume of Microfossils. Edited by Chengdu Institute of Geology and Mineral Resources.) | 1983 |
| details | Devonian | USSR(Ukrainian SSR) | Bagdasaryan,L.L. Study of natural bitumens as a new trend in palynology. (In: Palynology in the USSR. A.F.Chlonova, editor) | 1988 |