M. Amir Abas and M. Dahlui, Investigating Ultra Violet (UV) Strength against Different Level of Altitude using New Environmental Data Management System. journal = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology. November 2011, vol. 59(11). 654 - 658 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/14339.