Ningrum, Puspa, Husnah, and Husni Mubarak. “Pengaruh Penambahan Abu Tandan Sawit Pada Tanah Lempung Berdasarkan Nilai Kuat Geser”. Aptek 14, no. 1 (January 19, 2022): 46–52. Accessed December 17, 2025. https://ojs-staging.upp.ac.id/index.php/aptek/article/view/1104.