“EVALUASI UJI DENSITY METODE ASTM D 1298 Dan D 6822”. Swara Patra : Majalah Ilmiah PPSDM Migas 9, no. 1 (April 12, 2019): 1–6. Accessed June 6, 2026. https://dev-ejurnal.ppsdmmigas.id/sp/index.php/swarapatra/article/view/192.