MB van Ryneveld, AB Fourie, and IH Palmer. “Movement of Contaminants in the Unsaturated Zone of the Subsurface from a Low Flush on-Site Sanitation System in Ivory Park, Johannesburg”. Water SA 42, no. 4 October (October 25, 2016). Accessed November 24, 2024. https://watersa.net/article/view/10865.