Posthumus, D., & Woollatt, G. (2016). Sampling and analyses of polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furans (PCDFs) emissions in South Africa: A practitioner’s guide. Clean Air Journal, 24(2), 29–32. https://doi.org/10.17159/caj/2014/24/2.7063