Author: Heaslip, W.G., 1968.:
Title: Cenozoic evolution of the alticostate Venericards in Gulf and East Coastal North America.
Description: Palaeontogr. Amer., 6(39): pp. 51-135, many photos on 10 pls., 28 figs., refs., index. Large 4to. Orig. wrs. Small repair to one corner.

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