Harahap, Iman Yani, and M. Edwin Syahputra Lubis. “ASSESSMENT OF WATER TABLE MODEL ON OIL PALM AREA IN A HILLY LAND”. Jurnal Penelitian Kelapa Sawit 25, no. 2 (August 1, 2017): 71-84. Accessed September 8, 2024. https://jurnalkelapasawit.iopri.org/index.php/jpks/article/view/26.