Foraminifera source request
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Rutten, L. (1928) On Tertiary rocks and Foraminifera from northwestern Peru, Konink. Akad. Wet. Amsterdam, Pr., vol. 31, no. 9, p. 931—946.
Rutten, L. (1928) On Tertiary rocks and Foraminifera from northwestern Peru, Konink. Akad. Wet. Amsterdam, Pr., vol. 31, no. 9, p. 931—946.