Author: Walliser, O.H., 1964.:
Title: Conodonten des Silurs.
Description: [Abh. Hess. Landesamt. Bodenf., 41.] Wiesbaden. Large 8vo. Pp. 106,[60], numerous microphotos on 32 pls., 4 fold. tabs., 10 figs., bibl. Orig. wrs. Front cover a bit foxed, contents fine.

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