Author: Horný, R., & Bastl, F., 1970.:
Title: Type specimens of fossils in the National Museu, Prague. Volume 1. Trilobita.
Description: Prague: Museum of Natural History. 8vo. Pp. 354, frontisp. portr. of J. Barrande, many phoosd on 29 pls., 32 pp. of other illus., 4 fold. diagrs., refs., index. Orig. stiff wrs.

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