H. de J. Van Wyk

• Marketing research
• Marketing research
• The economic importance and growth of selected districts in the Republic of South Africa, 1980
• Geographical distribution of the taxable income, assessments, and taxes of whites, coloureds, and Asians, 1970-1982
• Guide to associations, agricultural control boards, co-operatives, and employee/employer organisations in the RSA, 1985
• Income and expenditure patterns of urban Black multiple households in Durban, 1985
• Income and expenditure patterns of urban Black multiple households in the Vaal Triangle, 1980
• Income and expenditure patterns of urban Black multiple households in the Vaal Triangle, 1985
• Motor vehicle statistics as indicators of regional economic growth and welfare
• The economic importance and growth of selected districts in South Africa, 1995
• The economic importance and growth of selected districts in the RSA and TBVC countries, 1985
• The geographical distribution of dwelling-units in the RSA and TBVC countries by population group