Górka, 1969
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Górka, H., 1969: Mikroorganismes de l'Ordovicien de Pologne. Palaeontologia Polonica, no.22, p.1-102, pl.1-31.
Górka, H., 1969: Mikroorganismes de l'Ordovicien de Pologne. Palaeontologia Polonica, no.22, p.1-102, pl.1-31.