Author: HAMMEN, TH. VAN DER
Title: Climatic periodicity and evolution of South American Maestrichtian and Tertiary floras (a study based on pollen analysis in Colombia).
Description: 1957. Reprint Bol. Geol. V; pp. 49-91, 9 fig. 1 plt. h.t. folding-out. Orig. wrps. with libr. stamp, very good, 4to.

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