Topic: radiesthesia

Hachfeld, B.; Schippmann, U. (2002). Incidence 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). Population dynamics and sustainable harvesting of the medicinal plant Harp...