Author: SANDO, W.J.
Title: Coelenterata of the Amsden Formation (Mississippian and Pennsylvanian) of Wyoming.
Description: 1975. US Geological Survey Professional Paper 848-C; 31 pp. 6 fig. 10 plts. h.t. Orig. wrps. with libr. stamp, very good, 4to.

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