Santoso, Heri, and Winarna Winarna. “The Exploration of The Oil Palm Leaf Nutrients Content Using Unmanned Aerial Vehicle and Multispectral Camera”. Jurnal Penelitian Kelapa Sawit 29, no. 1 (April 20, 2021): 49-62. Accessed October 8, 2024. http://jurnalkelapasawit.iopri.org/index.php/jpks/article/view/145.