Nik Daud, Nik Mohd Farhan, Mohmadisa Hashim, Nasir Nayan, Yazid Saleh, Hanifah Mahat, Zahid Mat Said, and Kadaruddin Aiyub. 2018. “Penggunaan Persamaan Universal Soil Loss Equation Dalam Menganggar Hakisan Tanih Di Universiti Pendidikan Sultan Idris: Kajian Kes Kampus Sultan Azlan Shah, Proton City: The Usage of Universal Soil Loss Equation in Estimating the Soil Erosion in Universiti Pendidikan Sultan Idris: A Case Study of Sultan Azlan Shah Campus, Proton City”. GEOGRAFI 6 (1):41-49. https://ojs.upsi.edu.my/index.php/GEOG/article/view/2078.