South African Journal of Industrial Engineering On-line version ISSN 2224-7890
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MEYER, J.A.M. and PRETORIUS, L..A systems thinking conceptual model for value creation in the African cement market. S. Afr. J. Ind. Eng. [online]. 2021, vol.32, n.3, pp.10-18.
ISSN 2224-7890.