Author: Kummerow, E.H.E., 1939.:
Title: Die Otstrakoden und Phyllopoden des Unterkarbons. [Abh. Preuss. Geol. Landesanst., N.F., 194.]
Description: Berlin 1939. Large 8vo. Pp. 107,[3], many figs. on 4 plates, 20 figs. in text, bibliogr. Orig. wrappers.

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