LUBIS, Rudi; HARAHAP, Marabangun. PENGARUH PENAMBAHAN SERAT IJUK DAN TEMPURUNG KELAPA TERHADAPKUAT TEKAN BETON. EINSTEIN (e-Journal), [S. l.], v. 3, n. 2, 2015. DOI: 10.24114/einstein.v3i2.5460. Disponível em: https://jurnal.unimed.ac.id/2012/index.php/einsten/article/view/5460. Acesso em: 12 oct. 2025.