Keyword ""MIDDLE" CAMBRIAN" in:
Occurrences of hexactinellid sponges (Porifera) in the Jince ("middle" Cambrian, Drumian) and the Šárka formations (Ordovician, Darriwillian) in the Barrandian area (Czech Republic)
Mergl,M., Fatka,O., volume 46, 2013 (GRR for 2012), pages 185–188
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