“Effect of Sandstone Compressive Strength Value on Differences in Physical Conditions in Samarinda City, East Kalimantan Province: SANDSTONE UCS”. PROMINE 10, no. 1 (June 22, 2023): 22–29. Accessed April 13, 2026. https://journal.ubb.ac.id/index.php/promine/article/view/3273.