Author: Westbroek, P., 1967.:
Title: Morphological observations with systematic implications on some Palaeozoic Rhynchonellida from Europe, with special emphasis on the Uncinulidae.
Description: [Leid. Geol. Meded., 41(1).] Leiden. 4to. Pp. 82, many photos on 14 pls., 81 figs., 2 fold. tabs. in pocket, bibl. Orig. wrs.

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