Joakim Samuelsson and Jacques Verniers (1999)
Middle to Late Ordovician chitinozoan biozonation of the Sennette,Dyle-Thyle and Orneau valleys,Brabant Massif,Belgium
Acta Universitatis Carolinae Geologica, vol. 42 (3/4) p. 299-302.
18574, 130, 129, 128, Bw, CALBRAB, ORD, PALGEO, STRATBIO
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