Hon, C. F., Jonker, C. Z., Mearns, K., & Stoffberg, H. (2017). The Assessment of Energy Efficiency through the Thermal Insulation of Residential Windows in Sandton, Gauteng, South Africa. The International Journal of Science & Technoledge, 5(3). Retrieved from http://internationaljournalcorner.com/index.php/theijst/article/view/123438