Author: WYNGARD, G.L.
Title: A detailed taxonomy of Upper Cretaceous and Lower Tertiary Crassatellidae in the eastern United States - an example of the nature of extinction at the boundary.
Description: 1993, United States Geological Survey, Professional Paper 1535; 131 pp. 23 fig. 22 plts. h.t. Orig. wrps. 4to.

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