Foraminifera source request

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Brönnimann, P.; Koehn-Zaninetti, L. (1969). Involutina hungarica Sidó et Involutina farinacciae, n. sp., deux Involutines post-triasiques, et remarque sur Trocholina minima Henson. Paläontologische Zeitschrift. 43(1-2): 72-80.