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Citation: G. Bagnoli et S. Stouge, Lower Ordovician (Billingenian-Kunda) conodont zonation and provinces based on sections from Horns Udde, north Oland, Sweden, Bollettino della Societa paleontologica italiana , 35(2), 1996, pp. 109-163
Citation: G. Bagnoli et S. Stouge, Lower Ordovician (Billingenian-Kunda) conodont zonation and provinces based on sections from Horns Udde, north Oland, Sweden, Bollettino della Societa paleontologica italiana , 35(3), 1996, pp. 109-163
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