CITES non-detriment findings : guidance for perennial plants : a nine-step process to support CITES scientific, authorities making science-based non-detriment findings (NDFs) for species [...] / Daniel Wolf, Thomasina E.E. Oldfield, Uwe Schippmann, Noel McGough, Danna J. Leaman ; Traffic, the wildlife trade monitoring network, BfN, Bundesamt für Naturschutz, WWF. Bonn, Germany : Bundesamt für Naturschutz, 2016
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