Author: Helmens, K.F., 1990.:
Title: Neogene-Quaternary geology of the High Plain of Bogotá, Eastern Cordillera, Colombia. Stratigraphy, paleoenvironments and landscape evolution. [Dissert, Bot., 163.]
Description: Berlin: J. Cramer / Borntraeger. 8vo. Pp. vi,202, 63 photos and 49 figs. and maps in text, 15 tabs., 1 large fold. col. geol. map in 2 sheets in pocket, refs. Orig. wrappers. - Doctoral thesis, University of Amsterdam.

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