Syafyudin, B.A. et al. 2021. THE USE OF COCONUT SHELL CHARCOAL AS AN ADDED MATERIAL TO THE CONCRETE MIX OF Fc’ 14,53 MPa. RETENSI. 1, 2 (Jun. 2021), 43–49. DOI:https://doi.org/10.31573/retensi.v1i2.321.