Author: Hacht, U. von (editor), 1990.:
Title: Fossilien von Sylt III.
Description: Hamburg: I.-M. von Hacht. 8v0. Pp. 318,xx, numerous photos on plates, figs., refs., index. Orig. stiff pictorial wrappers. Fine new copy. - Includes several contributions, especially on Ordovician sponges.

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