1. Veld types of South Africa, 2nd edn;Acocks;Mem. bot. Surv. S. Afr.,1975
2. La structure du Rosmarineto-Licthospermetum helionthemetosum en Bos-Languedoc;Barkman;Blumea suppl,1958
3. The physiognomic approach;Beard,1978
4. ‘n Plantsosiologiese studie van die Suikerbosrandnatuurreservaat;Bredenkamp,1975
5. ‘n Plantekologiese studie van die Manyeleti-wildtuin;Bredenkamp,1982