Author: Westermann, G.E.G., 1972.:
Title: Middle Jurassic ammonoid fauna and biochronology of the SArgentine-Chilean Andes. Part I: Hildoceratidae.
Description: Palaeontogr., Abt. A, 140(10-3): pp. 1-116, numerous photos on 31 plates, 1 table, 40 figs., refs. 4to. Paperbound, orig. printed wrappers. Fine, as new.

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