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| details | Wealden | Aptian | England | Bolkhovitina,N.A. Distribution of Schizaeaceous spores in Jurassic and Lower Cretaceous deposits of Eurasia. | 1971 |
| details | Wealden | Aptian | E.Germany | Bolkhovitina,N.A. Distribution of Schizaeaceous spores in Jurassic and Lower Cretaceous deposits of Eurasia. | 1971 |