Author: JANSSEN, A.W.
Title: Evidence for the occurrence of a skinny or minute stage in the ontogenetical development of Miocene Vaginella (Gastropoda, Euthecosomata) from the North Sea and Aquitaine basins.
Description: 1984. Meded. Werkgr. Tert. Kwart. Geol. 21-4; pp. 193-204, 13 fig. Orig. reprint, very good, 4to.

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