Author: NORTH, F.J.
Title: On Syringothyris Winchell, and certain Carboniferous Brachiopoda referred to Spiriferina D'Orbigny.
Description: 1920. Quart. J. Geol. Soc. LXXVI-2; pp. 162-227, 6 fig. 3 plts. h.t. wiyth brachiopods. Orig. extract with journal's printed covers, very good, uncut.

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