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Author - title
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| details | Bajocian | Oxfordian | France(Poitou) | Valensi,L. Microfossils from flint of the Middle Jurassic. Petrographic remarks. | 1953 |
| details | Bajocian | France | Sarjeant,W.A.S. The stratigraphic application of fossil microplankton (dinoflagellates and hystrichospheres ) in the Jurassic. | 1964 |