WASET
    Nthabiseng Portia Mahumapelo and  Andre van Niekerk and  Ndabenhle Sosibo and  Nirdesh Singh,  Assessing the Suitability of South African Waste Foundry Sand as an Additive in Clay Masonry Products.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2020, vol. 164(8). 186 - 190
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/10011351.