Azahar, Tengku Mohd, Idris Abu Seman, Abu Hassan Darusman, and Norazlin Ibrahim. “Assessment of Basal Stem Rot Disease Distribution in Palm Oil Plantation Using Geographical Information System”. Journal of Science and Technology 6, no. 2 (December 22, 2014). Accessed September 17, 2019. https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/922.