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3. Becker, G.M., Bless, M.J.M., Streel, M., Thorez, J., 1974. Palynology and ostracode distribution in the Upper Devonian and basal Dinantian of Belgium and their dependence on sedimentary facies. Mededelingen Rijks Geologische Dienst, Nieuwe Serie 25 (2), 9–99.
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5. Chapter 18C. Mississippian miospores;Clayton,1996