“PENGARUH KOMPOSISI SERAT IJUK DAN BATU GAMPING TERHADAP SIFAT MEKANIK BETON”. EINSTEIN (e-Journal) 7, no. 1 (February 16, 2019). Accessed March 24, 2026. https://jurnal.unimed.ac.id/2012/index.php/einsten/article/view/12483.