Author: Bonet, F., 1952.:
Title: La facies Urgoniana del Cretácico Medio de la región de Tampico.
Description: *Bol. Asoc. Mexic. Geol. Petrol., 4(5/6): pp. 153-262, 49 photos (mostly of fossiliferous rock samples) on 44 pls., 1 fold. pl. of sections, 1 fold. tab., 3 figs., bibl. Journal issue, orig. wrs.

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