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DISSERTATIONES BOTANICAE: Volume 163: Helmens,Karin F.:Neogene-Quaterna- ry Geology of the High Plain of Bogota (Eastern Cordillera, Colombia). Stratigraphy, Paleoenvironments and Landscape Evolution). 1990. 2 maps. VI,202 p. gr8vo. Paper bd. (43190) 47.00
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