De Boer, Ann-Louise; Du Toit, Pieter Hertzog; Bothma, T.J.D. (Theodorus Jan Daniel)(Vaal Triangle Faculty of Northwest University in South Africa, 2015-11)
Scheepers, M.D. (Maria Detken); De Boer, Ann-Louise; Bothma, T.J.D. (Theodorus Jan Daniel); Du Toit, Pieter Hertzog(Library & Information Association of South Africa, 2011-04-30)