Author: Adrichem Boogaert, H.A. van, 1967.:
Title: Devonian and Lower Carboniferous conodonts of the Cantabrian Mountains (Spain) and their stratigraphic application.
Description: Leid. Geol. Meded., 29: pp. 129-192, many microphotos on 3 plates, 68 illustr. in text, 6 fold. diagrs. in pocket, refs. 4to. Plain new wrappers.

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