Sipho-cameral structures in some Silurian cephalopods from the Barrandian area (Bohemia)

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New data and revision of three gymnosperms from the Cenomanian of Bohemia – Sagenopteris variabilis (VELENOVSKÝ) VELENOVSKÝ, Mesenea bohemica (CORDA) comb. n. and Eretmophyllum obtusum (VELENOVSKÝ) comb. n.

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Neue oder wenig bekannte Pflanzenarten aus den Perucer Schichten (Cenoman) der Bohmisschen Masse

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