Visano, Mizi Adha, Meizul Zuki, and Damres Uker. 2020. “CORRELATION BETWEEN TOPOGRAPHY AND HEIGHT OF TREE WITH FATIGUE OF WORKER AND PRODUCTIVITY OF PALM OIL HARVESTING”. Jurnal Agroindustri 10 (2):118-28. https://doi.org/10.31186/j.agroindustri.10.2.118-128.