Harahap, M. H., Ritonga, W. . and Adelia, N. . (2023) “Characteristics of Concrete With Red Sand Mixture 80 Mesh Grain Size After Combustion”, Jurnal Penelitian Pendidikan IPA, 9(8), pp. 6540–6547. doi: 10.29303/jppipa.v9i8.3107.