denotes titles either for sale for noted price or to pick up free according to the rules.
this title is not in stock now, but will be obtained on demand by about one month.
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PDF on demand
Cooper G. A., Arellano A. R. V., Johnson J. H., Okulitch V. J., Stoyanow A., Lochman C., 1952: Cambrian stratigraphy and paleontology near Caborca, northwestern Sonora, Mexico. With 31 plates, 184 pp. Discount 20%!
Cooper G. A., Dunbar C. O., Duncan H., Miller A. K., Knight J. B., 1953: Permian fauna at El Antimonio, Western Sonora, Mexico. With 25 plates, 111 pp. Discount 20%!