Author: HODSON F.
Title: Marker horizons in the Namurian of Ireland, Britain, Belgium and Western Germany.
Description: 1957. Ass. Ét. Paléont. Strat. Houill. Publ. 24; 26 pp. 5 plts. with ammonites plus descript. pages h.t. 2 plts. h.t. with geol. sections (1 folding-out). Orig. wrps. very good, uncut, 4to.

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