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The beginnings and history of land plants.
Fossil floras from southern Ecuador.
The Weichselia stage in the Andean geosyncline.
Late Tertiary fossil plants from eastern Colombia.
The genus Linguifolium of Arber.
Fossil floras from southern Ecuador.
The Weichselia stage in the Andean geosyncline.
Late Tertiary fossil plants from eastern Colombia.
The genus Linguifolium of Arber.