Kgopa, Pholosho M, et al. “Suitability of Treated Wastewater With Respect to PH, Electrical Conductivity, Selected Cations and Sodium Adsorption Ratio for Irrigation in a Semi-Arid Region”. Water SA, vol. 44, no. 4 October, Oct. 2018, doi:10.4314/wsa.v44i4.04.