Foraminifera source request

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Bielecka, W.; Styk, O. (1981). Biostratygrafia otwornicowa aalenu i bajosu na Kujawach - Foraminiferal biostratigraphy of the Aalenian and Bajocian of Kujawy. Kwartalnik Geologiczny. 25(4): 651-673 (in English with a Polish summary).