Invasive plant speciesArchived 2008-12-20 at the Wayback Machine. Plant Protection Research Institute. South Africa Agricultural Research Council. Last updated 2008-05-29. Retrieved on 2008-11-28.
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Invasive plant speciesArchived 2008-12-20 at the Wayback Machine. Plant Protection Research Institute. South Africa Agricultural Research Council. Last updated 2008-05-29. Retrieved on 2008-11-28.