Devonian stratigraphy, correlations and basin development in the Balkan Terrane, western Bulgaria von Boncheva, I., Lakova, I., Sachanski, V., Koenigshof, P.

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Ordovician graptolites from the basal part of the Palaeozoic transgressive sequence in the Karadere area, Zonguldak Terrane, NW Turkey; pp. 227–232 von Göncüoglu, M C, Gutiérrez-Marco, J C, Okuyucu, C, Sachanski, V

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New conodont and palynological data from the Lower Palaeozoic in Northern Camdag, NW Anatolia, Turkey von Boncheva, I, Goncuoglu, M C, Leslie, SA, Lakova, I, Sachanski, V, Saydam, G, Gedik, I, Konigshof, P

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Wenlock (Silurian) graptolitic shales from the Kocaeli Peninsula (Derince-Izmit), NW Turkey von Sachanski, V, Goncuoglu, M C, Gedik, I

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Boundaries of the Silurian System in Bulgaria defined by graptolites von SACANSKI, V.V

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Boundaries of the Silurian System in Bulgaria by graptolites von SACANSKI, V

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