Firdaus, M. “STUDI PENANGANAN KELONGSORAN DI DAERAH EMPAT LAWANG STA PI 13+850”. Jurnal Deformasi 1, no. 2 (February 13, 2017): 44–57. Accessed December 24, 2024. https://jurnal.univpgri-palembang.ac.id/index.php/deformasi/article/view/918.