van Tonder, M., de Beer, D.J. and Wichers, H. 2020. A QUALITY ASSURANCE FRAMEWORK FOR SULPHONIC ACID-COATED SAND USED IN 3D PRINTING APPLICATIONS. The South African Journal of Industrial Engineering. 31, 3 (Nov. 2020), 218–229. DOI:https://doi.org/10.7166/31-3-2447.