بواسطة في كانون الثاني 22, 2025
Hachfeld, B.; Schippmann, U. (2002). Occurrence and density of Harpagophytum procumbens in Namibia and South Africa. Proceedings of the Regional Devil’s Claw Conference 26-28 February 2002. Windhoek, Namibia (Ed CRIAASA-DC). Hachfeld, B. (2003). Ecology and utilization of Harpagophytum procumbens (satan's claw) in southern Africa. Federal Agency for Nature Conservation, Bonn. Strobach, M., Cole, D. & Schippmann, U. (2007). Inhabitants dynamics and sustainable harvesting of the medicinal plant Ha...
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