M. Hudzari, R., W. . Aimrun, M. H.A. Ssomad, and M. S. Norazean. “Application of Geographical Information System for Farm Mechanization Education and Training”. Scientific Journal of Pure and Applied Sciences, vol. 2, no. 4, Apr. 2013, pp. 196-03, http://sjournals.com/index.php/sjpas/article/view/983.