BIBLIOGRAFIE: P. J. CONRADIE J. C. Thom Akroterion · Volume 41, Issue 34 (2014) DOI: 10.7445/41-3-4-208 Abstract No abstract Article information Published30 March 2014 PublisherStellenbosch University LicenseNo license URL DOI10.7445/41-3-4-208 Journal ISSN0303-1896; 2079-2883