Raj, J. K. “Point Load Strengths of Tertiary Sedimentary Rocks from the Batu Arang Area, Peninsular Malaysia”. Malaysian Journal of Science 16, no. 2 (June 28, 1995): 49–57. Accessed December 23, 2024. https://mjlis.um.edu.my/index.php/MJS/article/view/4793.