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| details | Nd | Nd | Higgs,K.T. Taxonomy and systematic study of some Tournasian (Hastarian) spores from Belgium | 1996 | |
| details | Late Semilukian | Voronezhian | USSR(Moscow) | Alekseev,A.S. et al. The Devonian and Carboniferous of the Moscow Syneclise (Russian Platform): Stratigraphy and sea-level changes | 1996 |