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“Ornamental Plants as Invasive Aliens: Problems and Solutions in Kruger National Park, South Africa”. Environmental Management41 (1): 32–51. (2008). doi:10.1007/s00267-007-9027-9. PMID17943344.
“Ornamental Plants as Invasive Aliens: Problems and Solutions in Kruger National Park, South Africa”. Environmental Management41 (1): 32–51. (2008). doi:10.1007/s00267-007-9027-9. PMID17943344.