Author: Beushausen, L., 1889.:
Title: Ueber einige Lamellibranchiaten des rheinischen Unterdevon.
Description: Jahrb. Preuss. Geol. Landesanst., Jg. 1888: pp. [ii],212-236,[4], 22 figs. on 2 lithogr. pls. Large 8vo. New plain wrs.

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