Author: Colloque Ordovicien-Silurien,:
Title: Brest, septembre 1971. [Mém. B.R.G.M., 73.]
Description: Paris 1971. 4to. Pp. 462, many photos and figs. on pls. and in text, tabs., refs. Orig. wrs. One corner little bumped, good otherwise. - Contains 44 papers arranged under three ehadings: Paléontologie (8), Sédimentologie (4) and Stratigraphie (32). Includes many papers in English.

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