T Strydom, JM Nel, M Nel, RM Petersen, and CL Ramjukadh. “The Use of Radon (Rn222) Isotopes to Detect Groundwater Discharge in Streams Draining Table Mountain Group (TMG) Aquifers”. Water SA 47, no. 2 April (April 29, 2021). Accessed April 28, 2024. https://watersa.net/article/view/10915.