Jimmus, M.E. and Dullah, S. 2018. Combination Effect of Rice Husk Ash and Eggshell Ash as Cement Replacements in Concrete: A Review. Borneo Journal of Medical Sciences (BJMS). 12, (Sep. 2018), 55. DOI:https://doi.org/10.51200/bjms.v12i.1399.