Effect of Sandstone Compressive Strength Value on Differences in Physical Conditions in Samarinda City, East Kalimantan Province: SANDSTONE UCS. PROMINE [Internet]. 2023 Jun. 22 [cited 2026 Aug. 20];10(1):22-9. Available from: https://www.journal.ubb.ac.id/index.php/promine/article/view/3273