Mohd Yusri, N. N., Kamaruddin, K., Mohd Saman, H. and Tutur, N. (2018) “Strength Performance of Sustainable Mortar Containing Recycle Sewage Sludge Ash (SSA)”, Scientific Research Journal, 15(1), pp. 47–58. doi: 10.24191/srj.v15i1.9355.