Mansyur M. The Experimental Study Of Wekondo Materialsplite And Sand Of Poni-Poniki District Tirawuta East Kolaka Regency As Material Of Concrete Making. IJTI [nternet]. 2017Dec.6 [cited 2024Nov.22];1(1):34-9. vailable from: https://jurnal.narotama.ac.id/index.php/ijti/article/view/470