Author: HAMMEN, TH. VAN DER
Title: El desarrollo de la flora Colombiana en los periodos geologicos. I. Maestrichtiano hasta Terciario mas inferior.
Description: 1954. Bogota, Boletin Geologico II-1; pp. 49-106, 7 plts. h.t. with figs. 21 plts. h.t. with drawings of palynomorphs. Orig. wrps. in complete issue, very good, 4to.

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