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Freytag, George F. and Daniel G. Debouck: Taxonomy, Distribution, and Ecology of the Genus Phaseolus (Leguminosae - Papilionoideae) in North America, Mexico and Central America. 2002. (SIDA, Botanical Miscellany, Bot. Research Inst. of Texas, 23). illus. (some col.). XVI, 300 p. gr8vo. Paper bd. (83789) 47.08
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