Oosthuizen, M.A., A.J. Mundackal, and C.Y. Wright. “The Prevalence of Asthma Among Children in South Africa Is Increasing - Is the Need for Medication Increasing As Well? A Case Study in the Vaal Triangle”. Clean Air Journal 24, no. 1 (June 3, 2014): 28–30. Accessed April 20, 2024. https://cleanairjournal.org.za/article/view/7050.