Abdoullah Namdar and Fadzil Mat Yahaya, Oil Palm Shell Ash - Cement Mortar Mixture and Modification of Mechanical Properties. journal = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology. January 2014, vol. 86(2). 173 - 175 [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/9997481.