Author: Schreve-Brinkman, E.J., 1978.:
Title: A palynological study of the Upper WQuaternary sequence in the El Abra corridor and rock shelters (Colombia).
Description: Amsterdam. `8vo. Pp. viii,109, 16 figs. and diagrs. (incl. 4 fold.), refs. Orig. wrappers. - Thesis. Also published in 'Palaeogeogr., Palaeoclim., Palaeoecol.''vol. 25.

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