Language related problems of limited English proficiency learners in Grade 1 = Les problèmes de langage chez les apprenants ne maîtrisant pas suffisamment la langue anglaise au niveau 1VILJOEN, C. F.South African journal of education. 2001, Vol 21, Num 2, pp 121-127, issn 0256-0100Article

The microprocessor measurement of low values of rotational speed and accelerationHANCKE, G. P; VILJOEN, C. F. T.IEEE transactions on instrumentation and measurement. 1990, Vol 39, Num 6, pp 1014-1017, issn 0018-9456Article

The Assessment of Scholastic Achievement-MotivationBOTHA, T. R; VAN VYK, J. D; VILJOEN, C. F et al.South African journal of education. 1985, Vol 5, Num 1, pp 41-46, issn 0256-0100Article