[1]
R. Marpaung, “PENGARUH SUBSITUSI OIL PALM SHELL (OPS) + SUPERPLASTICIZER TERHADAP KUAT TEKAN, TARIK DAN BERAT BETON”, Pilar, vol. 7, no. 1, Mar. 2012, doi: 10.53893/pilar.v7i1.393.