Author: Voorthuysen, J.H. van, 1950.:
Title: The quantitative distribution of the Plio-Pleistocene foraminifera of a boring at The Hague (Netherlands). / The quantitative distribution of the Pleistocene, Pliocene, and Miocene foraminifera of boring Zaandam (Netherlands).
Description: Meded. Rijks Geol. Dienst, N.S., 4: pp. 31-50;51-72,[2], many figs. on 8 pls., 19 figs. in text. 4to. Plain new wrs.

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