SIAHAAN, D. Potential of excavation of c sand in Aek Bolon Village as a building material based on the material feasibility requirements test for concrete construction. Jurnal Teknoreka, [S. l.], v. 1, n. 2, p. 41–50, 2025. Disponível em: https://ejournal.cria.or.id/index.php/teknoreka/article/view/343. Acesso em: 7 may. 2026.