Karunanithi, Srinivasan, and Thirumalini Perumal, Kabbilawsh. “Assessment of Chennai’s Ambient Air Quality Data Using Multivariate Analysis from 2005 to 2015”. Asian Journal of Applied Sciences 5, no. 2 (April 22, 2017). Accessed January 16, 2022. https://ajouronline.com/index.php/AJAS/article/view/4516.