Afriani, Lusmeilia, Ma’ruf Amril Siregar, and Eko Oktario Hidayat. 2021. “Study of Soil Improvement and Slope Protection on the Double Track Engineering Design Between Giham- Martapura”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 55 (2):103-15. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/12270.