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diversity patterns of Ordovician and Silurian chitinozoans of BaltoscandiaHints, Olle; Antonovitš, Liina; Nestor, Viiu; Nõlvak, JaakOrdovician By The Lakes : International Geoscience Programme Project 653 - Opening Meeting2016 / p. 19-20http://www.igcp653.org/wp-content/uploads/2016/03/A5-Programme-FINAL-WEB-2-REDUCED.pdf