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3. Impact of communal harvesting on Warburgia salutaris (‘pepper-bark tree’) in Mpumalanga, South Africa;Botha;Biodivers. Conserv.,2004
4. The Geology of the Mesina Area;Brandl,1981
5. Aantekeninge oor die groeitempo van aangeplante kremetartbome (Adansonia digitata) en opmerkinge ten opsigte van lewenstyd, groeifases en genetiese variasie van die spesie;Breitenbach;Dendrologiese Tydskrif,1985