Keyword "GRIFFELSCHIEFER FORMATION" in:

Preliminaryreport on the faunal associations of the uppermost Lower and Middle Ordovician of the Saxo-Thuringian region
Budil,P., Fatka,O., Kraft,P., Sá,A., Linnemann,U., Marek,J., volume 42, 2009 (GRR for 2008), pages 85–85
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